Shelterlogic Canopy Enclosure Kit 12 x 20 ft. Ripstop tough woven polyethylene fabric constructed with same quality fabric material as used on our popular SuperMax canopy cover. Heat sealed seams not stitched for a stronger bond and 100% Water resistance. Ultimate UV protection treated inside, outside and in between with added UV protection, fade blockers, anti aging, anti yellowing agent. 50+ UPF Sun protection blocking 98% of harmful UV Rays. Fits all 12 x 20 ft. Quick and easy set-up attached to canopy frame in minutes with bungee fasteners, reuse your existing bungees or reorder.