MAXXON 9' x 15" Pontoons • XPT-09/15Maxxon Pontoons are made of premium, commercial grade 0. 9 mm 1100 denier PVC that offers strength and protection against extreme abrasion. Comprised of a specialized layering involving 36 ounce, 77 pound tear strength polyester material. This "fabric" offers greater dimensional stability and tensile durability throughout the entire material. Additional layers of this same 1100 D PVC, called chaffing pads, are then thermal welded to the top and bottom