The ShelterLogic Ultra Max canopy enclosure kit adds a solid rear panel, 2 side walls and double-zippered front door to totally enclose your Ultra Max canopy. Made of 7.5-oz. per sq. meter pm² 3-layer ripstop polyethylene fabric. Waterproof and UV-treated. Includes bungee cords. Fits Canopy L x W ft. 40 x 30, Zippered Door Yes, Fastening Hardware Included Yes, Material Weight oz. per sq. m 7.5, Material Type Polyethylene fabric, Fastener Type Bungee, Color White, Windows No.