Carefresh natural is a premium, natural pet bedding made from safe, clean celluose fiber. It's free of inks, dyes, clay and other chemicals contaminants. It does not contain aromatic oils that exist in pine and cedar shavings. Carefresg Natural is tested for harmful contaminants and is sanitized to 380 degrees F to minimize bacteria, mold, and fungus. Premium CareFRESH bedding absorbs moisture, controls odor and provides a natural environment perfect for nesting, burrowing and foraging.