The ShelterLogic 18 x 20 ft. SuperMax Enclosure kit- seasonal Storage Solution made simple. Now you can quickly convert your 18 wide SuperMax Canopy to a functional, low cost enclosed shelter in minutes. Built to your canopies exact frame specs. The SuperMax enclosure kit easily attaches to your existing frame in minutes. Expand the use of your canopy, create more storage space. Ready to go out of the box. Fits all 18 x 20 ft. Heat sealed seams not stitched for a stronger bond. Constructed of ripstop woven polyethylene fabric. 50+ UPF Sun Protection blocking 98% of harmful UV Rays. Added UV protection, fade blockers, anti- aging, anti-yellowing and anti-microbial agents. UV protection treated inside, outside and in between. Quick and easy set-up attached to canopy frame in minutes with bungee fasteners, reuse your existing bungees or reorder.