The advanced engineered, ripstop polyethylene cover is 100% waterproof, heat-welded at the seams and triple-layered, and UV-treated inside-out with added fade blockers, anti-aging, and anti-fungal agents, creating an incredibly tough fabric that withstands the elements. Ratchet Tite cover-tensioning system ensures the cover is drum tight, while the Easy Slide Cross Rail system locks down the cover and provides continuous tightening. Quality ratchet and web strap components keep the cover looking tight and neat. Bonded with thermoset premium powder-coated finish, the 6-rib, 1-3/8" all-steel frame resists chipping, peeling, rust, and corrosion, while the patented ShelterLock stabilizers, the Garage-in-a-Box ensures rock-solid stability. 1-year warranty.