Red Dingo Army Green/Lime Green Pet Bed, Donut, Medium A waterproof, polyurethane membrane encases the interior of both the pillow and the donut keeping internal padding clean and dry The microfiber covers have a natural suede feel and are reinforced with a backing layer. Wadding encases the loose stuffing. This provides shape support and an extra layer of comfort Quality zippers allow the cover to be easily removed for washing.