The ShelterLogic 18' x 20' Canopy Enclosure Kit includes 1 double zippered front door panel, 1 solid rear panel and 2 side wall panels to convert your canopy into an enclosure. The panels are made of water-resistant, UV-treated polyethylene ripstop with heat-sealed seams for durability and UPF 50+ sun protection. Includes bungee cords.