Mats are covered with 18 oz. tough fire-retardent phthalate-free PVC coated vinyl; cover is sewn around foam. The vinyl coated nylon cover is strong, mildew resistant, anti-bacterial and wipes clean with a damp cloth. The mat is made with square side walls and is reinforced at all stress points for added durability.poly-ethylene (PE) foam - 1 3/8" thick PE mats have a hard feel, used for more strenuous exercises. Mat folds every 2 feet to minimize storage space when not in use. Velcro ends allow mats to safely connect to other mat to
