NEMOs unique Pawprints line the inside of your tent with a soft, washable fabric that not only keeps the floor safe from your pups paws and other sharp objects, but also provides a surface cozy enough for sleeping without a sleeping pad if you wish. The brushed polyester fabric snaps into the tent, providing wall-to-wall coziness that not only adds a layer of comfort and added protection, but also a small amount of insulation.