Polyester PROTECTS FLOORS FROM SCRATCHES, SCUFFS, AND CONTAINS ACCIDENTS: Our Dog Playpen Mat is designed to be the ultimate surface protection playpen accessory. Our mat protects your floors, contains any accidents, and provides a soft sure-footed surface that is welcoming to a pet’s paws. MULTI-PURPOSE: Our pet mat can be used for training, whelping, housebreaking, incontinence, and as a pee pad. This mat also works great as a cat litter box mat, dog car seat cover, and cargo trunk liner. ABSORBENT POLYESTER FABRIC, WITH WATERPROOF BACKING (SLIP-RESISTANT): Patented Drymate material absorbs and contains liquids and wicks away moisture. The waterproof backing stops liquids from soaking through and prevents them from damaging or staining the surface below. Our slip-resistant backing helps to keep the mat securely in place and prevents it from sliding around.