ShelterLogic SuperMax All Purpose Outdoor 10 x 20-Feet Canopy Replacement Cover for 2-Inch Frame Canopies (Cover Only, Frame Not Included) WATERPROOF COVER: 100% waterproof 6.5 ounce woven polyethylene fabric cover provides protection to you and your items from the elements TWIST-TITE: Patented tensioning system squares up the frame and tightens down the cover 50+ UPF SUN PROTECTION: Cover is made from polyethylene and treated to block 98% of harmful UV rays. Ultimate UV protection treated inside and out with added fade blockers for long lasting performance READY TO INSTALL: Cover attaches to frame fast and remains secure with bungee fasteners (sold separately) INCLUDES: 1 fitted cover with heat welded seams, which keeps water out and provides a stronger bond, unlike stitched seams