Litter Pearls Micro Crystals provide outstanding odor control! The non-clumping sand-sized crystal litter absorbs liquid waste and odor instantly and dries solid waste making it easy to remove from the litter box. The unique shape of the crystals makes the litter soft-on-paws making them perfect for indoor cats. Litter Pearls are cat friendly and non-toxic. Great for male cats with strong smelling urine.