DESC: Reduces Waste Receptacle odor by more than 50%.Easy to attach to Waste Receptacle Lid.Individually wrapped for maximum odor absorbency.Odor-Absorbing Carbon FiltersPowerful odor-absorbing Carbon Filters prevent escape of strong odors from the Disposable Waste Receptacle of your LitterMaid cat litter box, so your cat's area stays cleaner and fresher.Each Carbon Filter is individually wrapped to maintain maximum odor-absorbing power until you're ready to use it. And, they're so easy to use--just peel of the paper strip to expose the adhesive, then place adhesive-side down inside the cover of the Disposable Waste Receptacle Lid.The Carbon Filter continuously absorbs odors while the Disposable Waste Receptacle is in use, and it's conveniently discarded along with the filled Waste Receptacle.