Intersand Classic Carbon Shield is a premium clumping litter boosted with activated charcoal. Millions of microscopic pores trap odour particles to keep the box fresh longer. • Natural activated charcoal traps and holds odours • Odour control for up to 30 days, vs. 21 days for standard Classic • Natural clay made from high-quality sodium bentonite • Firm clumps for easy scooping A fresher litter box for your cat and for you.