ZMP1022 Features: * Gel mat * Cool gel keeps pets comfy * Puncture-resistant material * Rolls up for easy storage * Indoors or outdoors * Place in pet"s favorite bed * Quick and easy clean up Dimensions: * X-Small dimensions: 8" W x 12" D * Small dimensions: 12" W x 16" D * Medium dimensions: 16" W x 20" D * Large dimensions: 20" W x 36" D