Smart Cat wood-pellet cat litter is the environmentally friendly alternative to mineral, clay and silica based litters. Made from 100% wood sourced from sustainable forests, Smart Cat pellets are derived from wood flour, which contain no chemical additives. They are organic and biodegradable. The ultra high absorbency properties of Smart Cat means it retains its natural woodland pine fragrance for 10 days and beyond, verified by independent tests against competing cat litters. Smart Cat can be composted after use.