A device which includes a first foldable material and a second foldable material, said second foldable material coupled to the first foldable material to form an outer edge and having a stretchable binding disposed on the first foldable material opposite to the second foldable material and a zipper disposed substantially near the outer edge so that the zipper joins a first portion of the outer edge to a second portion of the outer edge when closed. The first foldable material may be a PVC-Coated polyester fabric with and anti-microbial coating. Some embodiments may include a layer of foam disposed between the first and second material.