The Catit Airsift Dual Action Odour Reducing Pad is our best-performing filter pad, combining two cat-friendly media: our powerful Magic Blue Ammonia Buster, plus activated carbon to keep nasty smells at bay. The Catit Airsift filters pads absorb odors instead of masking them with fragrant, chemical scents. Ammonia smells and other nasty odors are reduced so your cat can breathe freely while doing their business. For use in Catit litter boxes with Airsift filter system (Regular, Jumbo, SmartSift) Available in handy 2 or 6 packs