This mat is made using high quality foam with a rugged 21 oz. nylon reinforced vinyl cover that is flame resistant and mildew proof. These 2' fold, 1' panel mats are lightweight easy to store and handle. They include 2'' velcro on ends for connecting together. 2 3/8'' Polyethylene mats are the most common type of mat in use and are designed for tumbling and general use. The top is soft polyurethane, the bottom is firm poylethylene. Made in USA. 12 year guarantee.