Litter Pearls Tracksless crystal cat litter with ODORBOND is the ultimate non- clumping litter for odor control. Litter Pearls was the first U.S. brand of crystal cat litter and is made with the highest quality Silica Gel crystals available. Silica Gel is safe, non-toxic and allergen-free. Not only are Litter Pearls crystals safe for cats and people, they are also lightweight with high absorbency properties, requiring less litter than clay and other types of litters. This means, using Litter Pearls, less litter per cat ends up in the landfill. Trackless crystals’ powerful odor control is supplied by ODORBOND Technology, a proprietary, safe additive which neutralizes ammonia odors on contact. When used as directed Litter Pearls Tracksless will control ammonia odors for up to 30 days, keeping the litter box fresher, longer. Litter Pearls Tracksless low-tracking crystals are fragrance free and comfortable on cats' paws for a more pleasant litter experience.