ScoopFree Blue Crystals Litter disposable Trays, 4.5-Pounds Premium Blue Crystal Litter reduces odor 5 times better than clay and clumping litter Disposable tray for hands-off convenience Covered waste trap locks in odor and leaves litter box smelling clean and fresh Absorbs urine on contact and dries solid waste to reduce odor Low-tracking crystals dont stick to your cats feet