4″ thick memory foam sleep system provides superior comfort and support. Sleep system insert is made of 2″ memory foam and 2″ support foam and is protected by a liner that is made of waterproof material on the top side and breathable material on the bottom side. The fleece cover is soft, comfortable, and easily removable for machine washing. Our exclusive EZ Wash dog bed design allows for easy removal of the sleep surface for easy cleaning and washing. This dog bed will never bottom out and completely prevents painful pressure points. Our sleep system has been rigorously tested in the field by all different types of dogs. Dimensions: MED Exterior 27″ x 39″ x 10″, Interior 19″ x 30″, LRG Exterior 33″ x 48″ x 10″, Interior 25″ x 39″ Content: 100% polyester canvas and fleece-machine washable All dog beds are made with the highest quality materials and construction techniques. Guaranteed by 3 Dog Pet Supply for quality and craftsmanship. Dog bed covers are imported, and beds are assembled and filled in the USA.