Sophie Allport brand dog mat. This removable mattress cover -the cover has a zipper to be able to separate it from the padding comfortably- is made with a fun beige fabric with drawings of different dog breeds. Made of cotton, it will be the ideal resting place for small, medium or large dogs that love soft cushions. Available in three sizes: S, M and L. Please refer to the SIZE GUIDE for this mat for the exact measurements of each size. Materials: Outer fabric: 100% Cotton. Filling: 100% Polyester. Cover washing instructions: machine maximum 30º. Do not use bleach or tumble dry.