Filtr s aktivním uhlím do kočičí toalety

Fitted a compatible litter box from another brand perfectly, no need to trim them with scissors.

We live in a studio apartment, and the litter box is right next to the kitchen area. Odors were a real disaster until we came across this Fernpaw product. I inserted the carbon pads into the hooded litter box cartridge, and I felt the difference on the very first day. The activated carbon absorbs literally everything, the air is now clean and fresh, no ammonia at all. We replace the filters regularly and use them daily. There are 12 pieces in a pack, so we are stocked up for a long time. The polyester is durable and doesn't tear when being replaced. We are completely satisfied, I will order again once this pack runs out. An excellent product for household needs.

Easy to use replacement filter. Keeps the litter box area smelling fresher, super.

They are 100% worth the cost. I used to buy expensive filters at the vet, but these are just as good. The carbon inside is dense, and the outer polyester mesh is reliable. I inserted it into our old litter box with a cartridge, the 15 by 20 size fit perfectly. The air in the bathroom is always fresh now, even if I forget to clean it right away. I would buy again, the pack will last almost a year.

We have two cats at home, a British Shorthair named Musya and a regular domestic cat named Barsik. They share one litter box, located in the closet next to the kitchen, and it used to smell constantly. I built these pads into the hood. The activated carbon started capturing odors immediately. The polyester is durable, and the cats can't reach it to tear it. I've already changed it twice in a month and a half. The smell has completely disappeared, and it's now pleasant to go into the closet. It's not a veterinary product, of course, but it does a great job with hygiene.

Fernpaw filters are very practical. Deodorization works flawlessly between scheduled cleanings.

The carbon filters are perfect, there were exactly 12 pieces in the pack, all in perfect condition.

Keeps the litter box area smelling fresh. Replaced it after a month, everything was dry.

I use it for a litter box enclosure. The air has become noticeably cleaner, no air fresheners needed.

The 15 by 20 cm size fit perfectly into the cartridge. Fernpaw filters fit our litter box without any problems.

Would buy again without hesitation. The specifications fully match those stated on the website.

They eliminate odors perfectly, the activated carbon works. But when cutting with scissors, the polyester edges fray quite a bit.

The polyester material feels nice to the touch and is dense. The carbon doesn't spill out.

We have an older cat with kidney issues, so the smell in the litter box was just unbearable; regular deodorizers didn't help. We decided to try these Fernpaw carbon filters. The effect is amazing; the activated carbon completely neutralizes the specific odor. We change it once a week. 100% satisfied, this product is exactly meant for such tough, daily use cases.

The polyester material is durable. The activated filler eliminates odors well. Recommend.

Keeps the litter box area smelling fresh, just as claimed by the manufacturer. Five stars.

Would buy again. Keeps the litter box area smelling fresh between cleanings, perfect for a cat.

I was looking for filters compatible with a litter box enclosure, and these fit perfectly. They are easy to insert into the cartridge, require no fasteners, and everything is intuitive. At first, the cat sniffed the new thing on the lid, but then got used to it and doesn't pay any attention to it. The activated carbon literally absorbs all odors during the first few weeks; the apartment is now fresh, even when we don't clean the box every day. The manufacturer Fernpaw states it's for everyday use, and that's exactly how it works in practice. A pack of 12 lasts exactly a year, a very convenient format.

I searched for a long time for a solution for our hooded litter box. Our cat Basya lives in a studio, and any smell is immediately noticeable. These carbon pads from Fernpaw really absorb unpleasant odors between cleanings. There are 12 pieces in a pack, which will last almost six months. The activated carbon works, I will buy more.

The black color doesn't ruin the look inside the litter box. It contains odors well, I'm completely satisfied.

I bought these for my Siamese cat Mia. Our litter box is in a small pantry, so odors used to build up quickly. These charcoal inserts changed the situation. We change them every two weeks, and now the room always has fresh air. Thanks to the Fernpaw brand for a quality product. I’ll definitely order a couple more packs when these run out.

These charcoal inserts are just great. They keep the litter area fresh, and the smell doesn’t spread.

The activated charcoal included really reduces odors. There are 12 pieces in the package, so it turned out to be a very good deal.

The polyester is strong and doesn’t tear when replacing it. I’ll keep buying these filters.

The package has two packs of 6, 12 total as stated. Original product.

They fit our automatic litter box with no issues. Everything works as it should, no smell.

Easy to use. The activated charcoal removes the smell from the litter box instantly.

12 pieces in a pack is a good deal, Fernpaw made a good product. They filter very well.

I bought them for everyday use. The litter box smell is completely gone, and the cat is happy.

Keeps the litter area smelling fresh perfectly. I recommend these inserts to everyone.

The charcoal is truly active, not just a fragrance. The litter area constantly smells fresh.

I would buy them again, the activated charcoal neutralizes odors from the cat litter box very well.

They tone down the smell, but don’t remove it completely. I expected more from activated charcoal.

The deodorizing works perfectly. It’s very convenient that there are 12 pieces in one delivery.

Fernpaw makes good products. The black side with charcoal works great. I would buy again.

I was always embarrassed by the smell from the litter box when guests came over. It was terribly awkward because the litter box is in the hallway by the front door. I decided to try these Fernpaw filters and got a pack of 12. They were easy to install, and the 15 by 20 cm size fit perfectly into the slots in the lid. We noticed the effect literally on the second day. The charcoal granules absorb all the unpleasant odors between cleanings. Now the hallway smells fresh. The style is modern, the product is well made, and the material is durable. I’m very happy with the result, I’ll definitely buy again, and I recommend it to everyone who has a covered litter box.

The charcoal really works, the smell in the apartment is completely gone. The Fernpaw brand can be trusted.

The 15 by 20 cm size fit our litter box absolutely perfectly, and now replacing the inserts is a pleasure.

The filter cassette has been a lifesaver. I’m completely satisfied, the product really helps.

The product was a perfect fit for my cat. Easy to put into the litter box house.

Designed for daily use, we always keep them on hand. Completely satisfied with the quality.

Modern style and looks neat. Popped it into the cartridge and forgot about unpleasant surprises.

I doubted for a long time whether these filters were even needed in a covered litter box. Bought a pack to try. It turns out the activated carbon absorbs odors very effectively. We have the litter box in our pet's bedroom, and now there is absolutely no bad smell between cleanings. Modern style, durable polyester base. They are worth every penny.

Ordering these carbon filters for the second time now. We have two cats, so the load on the litter box enclosure is high. The activated carbon does an excellent job, the smell completely disappears right after the pets use the litter box. Modern style, doesn't affect the function, but looks neat. Will order more, as it's a great value and works well.

The polyester material is dense and doesn't tear when replacing. There are 12 pieces in the pack, enough for almost a year.

Fit compatible litter box models with no problems. Plugged it in and forgot about it.

Replacing filters is no longer a problem. Easy to use even blindly by feel in the dark.

The inserts are easy to use and install. Even a child could handle it. Smells in the hallway don't linger anymore.

The inserts work, there is almost no smell from the litter box. Only the Fernpaw brand marking is barely visible on the envelope.

The inserts fit easily into the cartridge. The activated carbon does the job.

Ordered for an enclosure with a cartridge. Easy to use and install, they hold firmly. Five stars.

These carbon inserts saved my nerves. The bathroom smells normal now.

Would buy again, as this isn't a veterinary product, but simply a hygiene accessory that works.

The litter box filters do an excellent job, the smell no longer escapes the enclosure.

Easy to change the inserts. Maintains freshness in the toilet area at a 5-star level.

The 15 by 20 cm dimensions fit a similar litter box model, the carbon does an excellent job.

Easy to use, no need to cut or trim anything to fit the cartridge.

Bought for an automatic litter box, they fit perfectly without trimming. The activated carbon works excellently.

These carbon filters saved our bathroom. Easy to change, the deodorizing effect is noticeable immediately.

Would buy again, the inserts maintain freshness in the toilet area. Very convenient to replace.

Keeps the litter box area smelling fresh, especially in small spaces. I recommend it.

Modern, stylish packaging design, but most importantly, the activated charcoal works flawlessly.

The cartridge doesn't stink anymore. Fernpaw filters are top-notch, I change them once a month and have no problems.

I bought these for my covered litter box, and the filters fit perfectly. They keep it smelling fresh.

12 pieces in a pack, very good value. The inserts are easy to use and do an excellent job.

Our litter box is in a tiny storage room, and these inserts helped make the air in there much fresher.

I use them for a litter box house. They hold the odor, but they need to be changed more often than the recommendations say.

I would buy again. The charcoal filters handle odors between litter box cleanings really well.

These charcoal inserts saved the situation. The litter box no longer gives off unpleasant odors.

The deodorizing function works without any complaints. Odors from the litter box no longer spread through the house.

The activated charcoal does its job; there is no smell at all between cleanings. Very satisfied.

The charcoal filters for the litter box really reduce odor. The package is large and will last almost a year.

We have a one-room apartment, and the litter box house was right in the hallway. As soon as the cat used the toilet, the smell spread instantly. We decided to try these Fernpaw charcoal filters. We noticed the effect on the very first day. The litter box area no longer gives itself away. We change the filter element every three weeks, and that's more than enough.

The 15 x 20 cm size fit our covered litter box perfectly. I cut it and inserted it without any problems, very convenient.

12 pieces will last a long time. I am completely satisfied with how the filters work; there is no smell from the litter box.

Modern style, and none of our guests complain about the smell of the cat litter box in the apartment.

The charcoal inserts are legit. the color is stylish, the size fit the automatic litter box. rating five

There is no smell at all between cleanings. But if the cat goes outside the insert, then it's already useless.

Just ordinary everyday use at home. Put it in and forget about odors for a couple of weeks.

They fit into the cartridge like they were made for it, the size matched. They removed the smell from the apartment in a couple of hours.

I inserted it into the Fernpaw litter box cartridge. The deodorizing works, but the corners turned out to be too sharp.

I bought these replacement filters for our British Shorthair's enclosed litter box. The deodorization is top-notch; the ammonia smell completely disappears between cleanings. The cat doesn't try to scratch them out, which is a big plus. There are 12 in (30 cm) a pack, enough for almost half a year of regular use. The polyester density seems pretty good, and the carbon doesn't shed when pulling them out of the cartridge. I would order them again without a second thought.

I use this for a covered litter box, and the smell is completely gone. Highly recommend buying this product.

Would buy again. The activated carbon works much better than various aerosol sprays from the store.

The 15x20 cm size fit the litter box perfectly, but the polyester itself is a bit thin and seems flimsy.

The covered litter box smells much better now. The carbon does a great job between cleanings.

12 pieces in a pack for this price is a total steal, they get rid of odors in no time.

Would buy again without a second thought. Keeps things smelling fresh even in a very small space.

The carbon really works, there are no more odors in the apartment. I got these for a covered litter box, the size fit perfectly.

The polyester material lets air pass through to the carbon perfectly. Deodorization is top-notch.

The carbon really works, the smell in the apartment doesn't appear anymore. Fernpaw filters do a fantastic job.

The activated carbon inside really works, the apartment smells fresh and clean again. Thanks to Fernpaw.

The carbon filters are dense and don't tear when installing them into the cartridge.

Excellent activated carbon, the smell between cleanings doesn't bother us anymore.

The filter cartridge is a standard size, and these Fernpaw replacement filters fit perfectly. They do the job well.

We have a British Shorthair, and the litter box is in a small hallway, so the stench gets pretty bad. I was replacing the Fernpaw filters once a week. For the first three days, it works great with absolutely no smell, but then the carbon obviously gets clogged. I thought the issue was the litter itself, so I switched to wood pellets, and with those, the filter lasted about five days. Ultimately, the smell is muffled but doesn't disappear completely, so I have to change them more often than I'd like to.

The carbon works flawlessly. Changing the filter is easy, making it great for everyday use.

They work just okay for a covered litter box. If you scoop frequently, there isn't much of a noticeable difference.

Bought this for my cat, and she's happy. The smell disappears as soon as the filter starts working.

I was really pleased by how easy they are to use. Open it, insert it, and you're done.

They do a great job of maintaining a fresh scent. The enclosure no longer smells like litter.

These carbon filters fit my automatic litter box perfectly. I will definitely be ordering more.

I put it in the litter box enclosure, and my wife immediately noticed that the unpleasant odor trail was gone. Good product.

Our pet cat calmly uses the covered litter box, and we don’t smell anything thanks to the inserts.

They do a good job with deodorizing, but when I tried to trim off the excess, the filling started crumbling out.

Everything is as described, perfect for a cat. The activated carbon absorbs odors.

Fernpaw filters provide excellent deodorizing. There’s no cat smell in the bathroom now.

The description says 12 pieces, but in reality there were only two filters in the pack.

I bought a pack of 12 for two cats. I change them regularly. The Fernpaw inserts filter the air very well. The 15 x 20 cm size fits the standard litter box cassette, and the mesh material is dense. I was pleased with the deodorizing performance; there is no cat urine smell at all. This is an everyday-use product, and I’ll keep buying it. Thank you.

Decent material, easy to cut with a knife if needed. They fit into the enclosure like they were made for it. I recommend them.

Helps between cleanings. The litter box doesn’t stink, and the air in the apartment is fresh and clean. Flawless.

Keeps the litter area fresh, the deodorizing really works. Very happy with the purchase.

We got a pack for our Siamese cat; his litter box is in the bathroom. Before, the ammonia smell was very noticeable in the mornings, but after installing these charcoal inserts from Fernpaw, the problem disappeared. We replace them every four weeks and insert them into the special cassette on the lid. The activated carbon inside absorbs everything excellently. I liked that the polyester material itself is quite dense; the cat couldn’t tear it with his claws when he tried to investigate the lid. The filters are intended for everyday use, and that’s exactly how we use them. We’ll continue ordering this brand.

Modern filter design, hides odors between cleanings. I would buy again without hesitation.

I was looking for filters for an automatic litter box that wouldn’t need trimming. The 15 by 20 cm size fit perfectly into the cassette. The activated carbon reliably blocks odors until the cleaning cycle. I use them daily and have no complaints. Completely satisfied with the purchase; the 12 pieces in the package will last for several months.

I bought these charcoal filters from Fernpaw for the covered litter box of our British cat, Marta. We live in a studio, so odors are a serious issue. The activated carbon does an excellent job: between cleanings, the litter box doesn’t smell at all, and the air has become much fresher. However, I do have one specific complaint about the packaging. Inside the large box there were only two paper sleeves with 6 pieces each. When you take out one filter, the others open slightly and start airing out. It would make more sense to seal them airtight. But overall, it’s a worthwhile product, and I’ll buy it again.

There are 12 pieces in the package, enough for almost a year. We change them once a month, and the litter area has become fresh.

The smell between cleanings disappeared; the activated carbon in the Fernpaw filters works reliably.

The 15 x 20 x 3 dimensions fit our enclosure like they were made for it. They hold odors very well.

The deodorizing features really work; the bathroom smells fresh.

The smell from the litter box no longer bothers us between cleanings; the charcoal works excellently.

We have a small studio apartment, so the odor issue was very serious. We decided to try these charcoal inserts from Fernpaw because the old ones had stopped helping. What can I say: the activated carbon really works. Before, as soon as the cat used the litter box, the smell would spread throughout the whole room, but now there’s practically none unless you get right up close to the enclosure. We change them every three weeks, which is the best schedule for us. I’m completely happy with the purchase and will order again when these run out. I especially like that there are twelve pieces in the pack right away.

The filters are fine for everyday use. It’s disappointing that they can’t be washed and reused.

A set of 12 pieces is good value. It will last almost a year of use in our litter box enclosure.

Convenient to use in the enclosure. But the set doesn’t include any Velcro to attach them under the lid.

I bought these Fernpaw filters for my British Shorthair. I used a different product before, but the smell would still seep out of the covered litter box. With these inserts, the problem disappeared. The activated carbon absorbs all odors between cleanings. Changing them is very easy, anyone can do it. The cartridge closed easily, the filter doesn't bunch up anywhere.

Helps reduce litter box odor. There is a sufficient amount of activated carbon inside.

The polyester doesn't absorb moisture from the air. The carbon works as it should.

The Fernpaw brand makes good products. The pet filters are high quality, I am happy with the purchase.

Ordered for an automatic litter box. The dimensions fit, but they sit too tightly in the cartridge.

The covered litter box doesn't give itself away anymore. The inserts really work.

The 12 pieces is a typo, my order had 2 as stated. Everything works, no smell.

Would buy again. The 15x20 cm size fit perfectly into our litter box cartridge, the carbon really absorbs odors.

The inserts are easy to use, just pop them in and you're done. The 15x20 cm size fit our litter box perfectly.

They fit easily into the cartridge of the covered litter box and eliminate odors immediately. Great product.

Bought for an automatic litter box, everything fit without any issues. Odor is kept under control.

Carbon inserts for covered litter boxes are a real find. 12 pieces in a pack, great price.

I used to buy them at a local store, but these from Fernpaw work better. The carbon is fine and evenly distributed throughout the polyester sheet. I put it in the litter box lid, and the fastener holds it tightly. In the bathroom, you can now breathe easily even on days when the cat uses the litter box right before we get home from work. Completely satisfied, would buy again.

Modern stylish design, doesn't ruin the look of the litter box enclosure. The color is neutral.

Activated carbon is a lifesaver. Before, the smell would immediately drift into the hallway, now I don't smell anything at all.

We have a Thai cat named Simon and his litter box is in a very cramped hallway. Before, as soon as the cat used the litter box, the smell would instantly spread throughout the apartment. We decided to try these activated carbon filters from Fernpaw. We change them every three to four weeks, placing them in a special cartridge on the lid of the covered litter box. We noticed the effect literally on the second day: the apartment stopped smelling like a cat litter box, the air became much fresher. The polyester material breathes perfectly but traps odors thanks to the activated carbon. A very handy thing for everyday use.

They absorb odors well between litter box cleanings. Completely satisfied, will buy more.

Would buy again. The 15x20 cm size fit perfectly, I trimmed the excess with scissors.

The covered litter box now works as it should. The smell passes through the carbon and is neutralized.

We use it with a covered litter box, very convenient. The deodorization works flawlessly, I recommend it.

I bought these for a compatible litter box. The size seems right, but they don’t sit tightly in the slots and sometimes fall out during cleaning.

The covered litter box no longer gives away where it is. It’s just a pity there are only 12 in (30 cm) the set.

I would buy again. The polyester doesn’t get moldy from moisture inside the box. The cat is happy.

They fit compatible litter boxes without any problems. The activated charcoal does its job.

The filters handle odors between cleanings, and the litter area smells much fresher now.

Good polyester, the charcoal granules don’t crumble out around the edges. Completely satisfied with the purchase.

The 15 x 20 cm dimensions are accurate. Everything fit in snugly and holds firmly.

I buy these for an automatic litter box. The inserts work great, freshness lasts between cleanings.

I would buy again, the pack will last a long time. The activated charcoal neutralizes unpleasant odors from the litter box very well.

The activated charcoal inside absorbs all the odors. The litter area is fresh now.

Fernpaw charcoal inserts for covered litter boxes work great, the odors are gone.

I would buy again, a worthy replacement for the original filters for an automatic litter box.

Does its job perfectly. The activated charcoal absorbs odors between litter box cleanings.

There is a bit of charcoal dust when unpacking, but they sit tightly in the litter box and absorb odors.

The 15 x 20 cm size fit our covered litter box, and the deodorizing works flawlessly.

They handle ammonia really well. The cat eats wet food, and the smell used to be strong, but now everything is great.

12 pieces in the pack is good value. We change them once a month, and now the bathroom stays fresh.

Quality Fernpaw material. The replacement elements are easy to use and stay securely in the cassette.

There are 12 pieces in the box right away. Enough for almost a year with regular replacement. I recommend them.

We have a studio, and the cat’s litter box is right by the front door. Before, you could smell it constantly, but now the problem is gone. These charcoal inserts fully live up to their purpose, the deodorizing works brilliantly. We change them every couple of weeks, and it smells fresh instead of like ammonia. I’ll be ordering more.

The deodorizing function works brilliantly. The polyester mesh is strong and doesn’t tear during installation.

I was looking for replacement filters for our British cat’s covered litter box. We chose the Fernpaw brand. The 15 by 20 cm size fit perfectly. The activated charcoal reduces odors between cleanings. There are 12 pieces in the pack, so it will last a long time. The deodorizing feature is especially useful for a small apartment. The charcoal inserts are easy to install in the cassette. Completely satisfied with the purchase.

The style is modern and unobtrusive. It doesn’t attract the cat’s attention, and he stopped chewing the edges.

The covered litter box no longer smells before the next cleaning. Completely satisfied.

Modern style with nothing unnecessary, the filter just does its deodorizing job.

Bought these for a compatible litter box. They are slightly too big by a few millimeters, I barely managed to fit them into the cartridge slots.

They fit perfectly in our covered litter box from a different brand. The air is fresh, I'm ordering a second pack.

Exactly 12 pieces in the pack, everything is neatly packed. They help keep the house clean.

Would buy again. The carbon really traps the odors, the litter box is in the hallway and is no longer a nuisance.

Not bad inserts, there's less smell. However, there are 12 pieces in a pack, which isn't enough for half a year.

Carbon litter box filters are a real lifesaver in a small apartment.

They fit my litter box enclosure. They eliminate odors in no time. Thanks Fernpaw.

The polyester material seems fine, but the cat sniffed it for a long time and avoided the litter box at first.

Easy to use, just insert it and you're done. Keeps the litter box fresh.

My British Shorthair cat, Bax, started using the enclosed litter box, but the smell in our studio apartment was terrible. I decided to try these Fernpaw inserts. I put them in the special cartridge on the lid. I didn't think it would help, but after a couple of hours, the air became noticeably fresher. We change them strictly every three to four weeks. I'm already buying my third pack, completely satisfied, would buy again.

This is a must-have for a litter box enclosure. The carbon eliminates litter box odors instantly.

Bought a pack of 12 for a covered litter box. The polyester is durable, the carbon doesn't spill out, everything is super.

The filters are easy to use and they hold their shape well despite being thin.

Would buy again. The inserts eliminate odors between cleanings. The cat eats dry food, now everything is fresh.

The activated carbon inside is fine-grained and doesn't spill out. The 12-piece pack is super.

Bought it for a covered litter box, the deodorization works excellently. There is almost no smell at all.

I bought a pack of twelve, now it will definitely last a long time. The carbon traps odors excellently.

I would buy these again. The litter box house now always has fresh air thanks to the activated charcoal.

A pack of 12 is very convenient. I change them as needed, and everything works like clockwork.

The charcoal absorbs odors excellently. The deodorizing works 100 percent.

The deodorizing works 5+. Just what you need for a covered litter box, I recommend it to friends.

I bought these for my old covered litter box. The 15 by 20 cm dimensions are listed correctly, and fitting it under the lid took just a couple of minutes. The polyester base is quite dense, and my cat didn’t tear it apart when he climbed in there. The ammonia smell is completely gone. I’ve already used three from this pack of 12, changing them every three to four weeks. I’m happy with the quality and will order this same batch again when I run out.

Keeps the room smelling fresher. The cat does not try to pull the filter out of the cassette.

I spent a long time looking for replacement elements for our automatic litter box. I tried different brands, but these from Fernpaw turned out to be the most reliable. The polyester base doesn’t get soggy from condensation inside the unit, and the activated charcoal reliably holds odors until the self-cleaning cycle kicks in. After three months of use, I haven’t noticed any deformation; they hold their shape perfectly.

Keeps the smell nice and fresh. Fernpaw makes quality products for pets.

The size matched, and the polyester quality is good. No more sharp smell after the cat visits.

Dense, don’t fall apart in your hands during installation. They neutralize litter box odor 100%.

Fits compatible litter boxes 100 percent. The cassette model is standard.

The dimensions are listed correctly, they fit my old litter box. The activated charcoal completely blocks the smell.

Easy to use and excellent at removing odors from the cat litter box. Five stars.

There’s almost no smell in the litter area now. The activated charcoal works flawlessly, and the cat is happy.

Fernpaw makes good stuff. The cassette with this filter no longer stinks, everything is spot on.

They fit our litter box house. Completely satisfied with the purchase of these replacement filters.

The activated charcoal works perfectly. Once again I’m convinced I made the right choice.

Convenient thing. the filters really remove the cat litter smell in the bathroom where the litter box is kept

I would buy these again. This isn’t a medical product, but a household necessity that works great.

The black color inside the litter box doesn’t look dirty. I change it once a month, everything suits me.

The inserts work like a charm. The charcoal absorbs well, and there’s no more cat smell in the house.

Exactly 12 pieces in the pack. Easy to change, the carbon doesn't get your hands dirty.

The polyester material feels nice to the touch and holds its shape. I would definitely buy it again.

They do an excellent job with odors in our litter box enclosure. The activated carbon really works between cleanings.

The litter box inserts really help. The smell from the box is gone, and the bathroom is now fresh.

The activated carbon in the filters really reduces the odor from the litter box. I am completely satisfied with the Fernpaw product.

Would buy again, the smell from the litter box is gone. Fernpaw makes quality products.

Would buy again, the 12 pieces in the pack last for a long time. The cat is happy with the fresh air.

Everything works, you can really feel the freshness in the litter area. Easy to use and put in place.

We have a Sphynx cat, and the litter box is right in the bathroom. Because of the high temperature in the bathroom, the smell would sometimes spread throughout the apartment. I decided to try the carbon inserts and bought a large pack of 12 right away. I inserted one into the lid of the covered litter box, and the 15 by 20 cm size fit perfectly. I noticed an improvement by the second day; the bathroom felt fresh. The polyester is dense, and the carbon doesn't spill out. We change them every three weeks. I am completely satisfied with the Fernpaw product.

Dense polyester, the carbon doesn't spill out. Would buy again without hesitation, everything is excellent.

Just insert it into the cartridge and you're done. Easy to use, they neutralize odors instantly.

Activated carbon works much better than old paper filters. I will be buying more.

They fit the litter box enclosure perfectly. No gaps, fits like a glove, and there's no stink.

The polyester material quality is justified. But the instructions on the box are printed in a font that is too small.

It maintains a fresh smell excellently. Bought it for a compatible litter box with no issues.

The 15x20 cm size turned out to be standard, fitting perfectly into our covered litter box cartridge without any issues. The Fernpaw brand didn't disappoint. I am completely satisfied with the purchase and will order again when I run out.

They do a great job with bad odors, but it would be nice if they added a black frame to the set too.

The litter box inserts lay flat, the size was a perfect match. The smell is completely gone, highly recommend.

The 15 by 20 dimensions fit to the millimeter. No strange odors from the filters themselves.

The polyester material feels nice to the touch and doesn't seem to break down from the moisture in the litter box.

They are perfectly suited for compatible litter boxes of the required size. They maintain freshness every day.

100% compatible with compatible litter boxes. The carbon filters save us from ammonia.

12 pieces will last a long time. Fernpaw inserts really eliminate odors, the apartment is clean.

The insert works. The activated carbon prevents ammonia smells from escaping the covered litter box.

The inserts are very easy to use; even a child could manage them. The deodorizing is top-notch.

I would buy them again. The activated charcoal does an excellent job with odors between cleanings.

I would buy them again. The inserts handle litter box odor well. The cat doesn’t try to pull them out.

The litter area smells much fresher now, especially when the filter is used in a small room.

The polyester filters turned out to be very durable and don’t tear during replacement. The smell no longer lingers in the apartment.

The style is modern, nothing unnecessary. The polyester material breathes but keeps charcoal dust contained.

My pet cat didn’t notice the replacement. The litter house smells much better now.

The 12-piece pack is very good value. It will last a long time, and the cat is happy.

The replacement inserts saved our small apartment. Now we’re not embarrassed to invite guests over.

I buy these for everyday use. The smell of cat waste is gone. I’ll be getting more.

The charcoal inserts for the litter box work. I put one in the litter house, and the smell disappeared completely.

The polyester material does not absorb moisture, only odors. Very convenient and hygienic.

I tossed the inserts into our automatic litter box, and the activated charcoal really eats up odors between cleanings.

I would buy them again. They’re easy to use and install in the cassette. The smell disappeared completely.

Stylish modern design and no extra chemical fragrances. Pure charcoal, I recommend it.

There are exactly 12 pieces in the pack, no deception. The size is 15x20, just like in the picture.

I hesitated for a long time about whether to buy non-original spare parts for our expensive litter box, but these inserts met my expectations. The polyester is dense, and the charcoal doesn’t crumble around the edges. We have two cats in the apartment, so odors used to appear quickly. With these, the hallway doesn’t smell like a cat litter box at all. I change them once every three weeks. Completely satisfied, I would buy them again.

The charcoal really works; the smell disappeared completely. I change them once a month, and the inserts fit exactly into the grooves.

The apartment is small, so the cat litter box is right in the room. With the Fernpaw filters, the air in the room has become noticeably cleaner. Our cat named Bucks calmly uses his covered house, and we no longer notice odors between cleanings. I ordered two packs at once, since the polyester inserts with charcoal inside look reliable. Charcoal dust doesn’t spill out during replacement, which is very convenient. One piece lasts about three weeks with active use. I’ll keep buying them because I’m completely satisfied with the result.

I inserted it into the cassette of the covered litter box, and the smell was noticeably milder by the evening.

I liked that the filters are thin and don't interfere with the litter box lid closing properly.

I use this in my British Shorthair's enclosed litter box, and the small bathroom has become noticeably fresher.

They fit into the automatic litter box without needing to be trimmed; the size turned out to be just right.

I bought these for the activated carbon. With two cats, the difference after cleaning lasts much longer now.

We have a covered litter box in the hallway, so any smell is immediately noticeable. After replacing the old filter with the Fernpaw one, I felt much better opening the apartment door, especially in the morning. Our cat, Masya, didn't react to the new insert at all and continued using the box as usual. I would order these again.

The material feels like dense polyester and doesn't fall apart in your hands when replacing it. I pop one into the covered box every few weeks, and the litter smell between cleanings has become much less harsh.

A pack lasts a long time; I keep a spare in the cabinet right next to the litter. The filters are lightweight and take up almost no space, so it's convenient to grab a few at once.

Our litter box has a narrow cartridge, so I was worried I'd have to cut it. Nope, I slipped it right in, and it sits perfectly. It doesn't magically eliminate smells, but it's become much more pleasant between cleanings.

The cat didn't try to paw the insert out through the grate, which means it doesn't have any off-putting smell.

The inserts turned out to be slightly larger, so I had to trim them with scissors for our litter box. It masks odors moderately well.

I would buy these again. The polyester layer is pleasantly dense and doesn't tear during replacement. It contains smells excellently.

Awesome filters. Size-wise, the Fernpaw filters fit perfectly into our litter box cartridge; I didn't even have to trim them.

We have a cat named Bax and a tiny bathroom. Previously, the smell was constant, especially if we missed a cleaning. The Fernpaw inserts really absorb the odor; the bathroom now just smells fresh instead of like ammonia. We've already replaced our third one; the cat stays calm and doesn't try to chew on the grate. A pack of 12 is small, sure, but it will definitely last for half a year.

We got these for our covered litter box. Our cat, Bax, loves fish, and the smell was awful. The carbon inserts saved our kitchen from the stench; I now order two packs at a time.

We have a British Shorthair named Musya, and her litter box is in the hallway. I popped the filter into the lid, and now the smell is barely noticeable. One pack will last a long time.

Maine Coons eat a lot and use the litter box frequently. Before, the box would stink by the evening. I replaced the grill filter on the roof with this one, and it's become much easier to breathe. Five stars.

We live in a studio apartment with our ginger cat, Thomas. The smell from the litter box was ruining our lives, especially since the kitchen is right next door. I decided to try these carbon cartridges. The inserts fit perfectly, and odors are completely neutralized within half an hour. I am absolutely happy with this purchase.