Catit Litter Freshener Pads Catit Litter Freshener Pads – Magic Blue is a non-toxic litter box filter that absorbs and retains up to 80% of ammonia, which is the most hazardous and pungent component of cat urine. The Catit Magic Blue Litter Box series allows for optimal air filtration. The hood helps capture hazardous ammonia gases inside, enabling the Magic Blue filterpads to absorb these much more easily and effectively. A cat’s sense of smell is about 15 times stronger than our own. So when pungent odors build up inside of the litter box, we certainly aren’t doing our cat any favors. Using Catit Magic Blue in combination with proper litter box hygiene, such as regular scooping and cleaning, will quickly result in better air quality for you and your cat. The Magic Blue Cartridge is a reusable plastic holder that fits every litter box. It has a cat-proof lock and comes with a handy docking station with adhesive sticker. The Magic Blue Cartridge set contains 1 cartridge and 2 filter pads (for 1 month). Each Magic Blue Filter Pad is sealed in a protective foil pouch for optimal performance. The pads are non-toxic, compact and lightweight. Just two small pads will last an entire month! The Magic Blue Refill Pads are available in sets of 6 (for 3 months).