TRAP CAT LITTER ODOR: Litter Genie Refill Bags feature multi-layers with odor-barrier technology, locking away odor and germs from soiled cat litter waste. LONG-LASTING REFILLS: One refill cartridge lasts up to 2 months with one cat! Each bag is large and durable for kitty litter waste from all cats regardless of age or size. COMPATIBLE WITH MOST LITTER GENIE PAILS: Only genuine Litter Genie Square Refills are specifically designed to fit Litter Genie Standard, Plus, and XL Pails. This is NOT compatible with the Easy Roll Pail. EASY TO USE: To conveniently replace the refill, tie a knot and pull the plastic film through the center of the refill. Place the refill in the pail and secure in place with the lid! PET PARENT MUST HAVE: Litter Genie Pails and Refills are necessities for any cat, small dog or rabbit parent! Trust the Litter Genie brand for a fresher smelling home.