Fleece-reinforced PVC membranes that offer superior durability and reflectivity. Carlisle's FleeceBACK PVC membranes feature Dupont's(R) Elvaloy(R) KEE copolymer, resulting in the most dependable PVC membrane in the industry. These membranes can be installed over a variety of existing roof systems and deck types. When combined with Carlisle's FAST and Flexible FASTâ„¢ Adhesives, FleeceBACK PVC membranes form one of the most dependable, highest-performing roofing options on the market today.