Jacket:100% filament polyester are combined with filament polyester,single jacket,twill weaving. Lining: PVC:creates an extremely smooth waterway surface, thereby significantly reducing friction loss and improving flow characteristics. The vulcanized adhesion system creates both a mechanical and chemical bond between the PVC lining and the inner jacket, eliminating the possibility of delamination as is experienced with competitive adhesive bonded rubber constructions. Feature: 1. Very lightweight and highly flexible 2. Good adhesion 3. Easy maintainence and handling 4. coating can improve abrasion resistance