Dog Gone smart dirty dog cushion is designed with same technology as the original dirty dog doormat with a thick poly-sheet insert for support and comfort. The exterior microfiber pad has an inner waterproof liner to protect the cushion; anti-skid bottom to help keep the mat in place. Includes a hidden zipper pocket to eliminate chewing and tearing of the zipper. Perfect for use as a crate liner, portable pet bed or for yourself as an anti-fatigue mat! species: dogs and specifications:  small: 19 x 24 inches. Medium: 21 x 30 inches. Large: 23 x 36 inches. Instructions for use:  use as a comfy crate liner, A floor mat under your feet or, where ever your dog loves to rest. Cover only washing instructions: Machine Wash in a warm, gentle cycle, wash with similar colors. Use a very small amount of regular detergent. Do not use fabric softener, dryer sheets or bleach as these will alter the finish of the fabric. Line drying is best.