Welcome to Ultra Pet! We introduced North America to its first silica cat litter, Litter Pearls & Ultra Pearls, and it has been a tremendous product since their introduction. Like all the other fine products from Ultra Pet ,  Litter Pearls & Ultra Pearls are made from high quality ingredients that deliver superior results.  Ultra Pearls are different because they are semi-spherical limiting tracking outside of the litter box and are soft on the cats’ paws.