ADCO  34845 Designer Series Gray/White 28' 7" - 31' 6" DuPont Tyvek Travel Trailer Cover Slip-Seam strapping system cinches at the top and bottom for a perfectly snug fit and prevents cover from wind damage; Reinforcements throughout bottom and top of side panels Water resistant but breathable; Tyvek RV top panel reflects sunlight, keeping RV cooler; Designer polypropylene sides Weighted buckle toss under for easy installation underneath the coach; Lapper cap reduces wear over ladder area Durable polypropylene grey side walls, 3 year warranty, 4 travel tire guards included with every cover The most durable All Climate Travel Trailer cover on the market; Fits 28'7" - 31'6"