From the manufacturer:
Cat Country, an all natural product is a special blend of wheatgrass fibers, combined by an organic chemist to work together and solve litter box odor. Cat Country contains no perfumes, chemicals or polymers found in clays and clumping litters. Cat owners must become aware that cats eat and breathe what they use for litter. The same should be considered also for the owners. A 2 inch filling of Cat Country with regular maintenance will last 2 to 4 times longer than other litter products—with NO ODOR. The Pellets are screened and air cleaned before packaging. For a gradual transition, which all cats prefer, place Cat Country on the bottom of the box with your usual litter on the top.