The Arm & Hammer Natural Paper Bedding for Guinea Pigs, Hamsters, Rabbits & All Small Animals is made with a tested and proven blend of baking soda, natural zeolite crystals, and activated carbon to provide an odor-free home for your animals. The bedding is perfect for heavy-duty use and can absorb up to 8 times its weight. The super light, soft texture is gentle on the paws and is fun for playing, nesting, and burrowing.