100% Natural Pine. Feline Pine uses the odor fighting powers of 100% Natural Pine instead of harsh chemicals or synthetic perfumes to eliminate the toughest odors. It's the smart choice for the health of your cat and home. Feline Pine is lightweight, which makes changing and filling the litter box faster and less strenuous. Feline Pine uses the power of a plant-derived clumping aid to help it clump tightly, so nothing is left behind but fresh litter. Using Feline Pine is the natural and healthy way to enjoy the benefits of a clumping cat litter. Eliminates tough odors.