Insulated Super Flex ™ - A tough PVC-coating resists chemicals and abrasion (outwearing leather), and its triple-layer construction of foam insulation sandwiched between a layer of 100%-cotton jersey and 100%-cotton interlock provides protection from cold while locking in warmth. Our low-temperature compound remains, flexible, even in sub-zero temperatures. Insulated Super Flex™'s wrinkle-finish provides additional resistance to abrasion and chemicals (where PVC is recommended) as well as an excellent grip, wet or dry.