Fit & Design: Dog mattress pad offers the same premium comfort as found in our human mattress pads and the same outdoor tested materials and design concepts Engineered for optimal body alignment, pressure point relief, and temperature regulation Two layers of high-performance memory foam provide added protection for the most comfortable dog camping mattress or sleeping pad available Waterproof and dirt resistant materials were selected with the great outdoors, cold temperatures and dogs in mind Easy care: hair, dirt, and water is easy to wipe/brush off the tear resistant cover; when a deep clean is necessary, the cover is easy to remove and machine wash Easy transport, simple storage and the durable handle makes transport a breeze: no pump or air required Sizes: Small - 26" l x 18" w Medium - 36" l x 24" w Large - 44" l x 30" w