Shelterlogic Canopy Enclosure Kit 10 x 20 ft. Fits all 10 x 20 ft MaxAP 1-3/8 in. Heat sealed seams not stitched for a stronger bond. Constructed of ripstop woven polyethylene fabric. 50+ UPF sun protection blocks 98% of harmful UV Rays. Added UV protection, fade blockers, anti- aging, and anti-yellowing agents.