Durable PolyPRO3 RV Covers provide streamlined, strong protection that stands out from the pack. PolyPRO3 fabric is a water-repellent 3-ply non-woven polypropylene that provides protection from bird droppings, snow, dirt, dust, scratches, and harmful UV rays. This cover is designed with adjustable tension panels and elasticized hem corners for a custom-like fit, while air vents reduce wind stress and inside moisture. The design also includes integrated straps and a toss bag system for quick installation. Zippered panels allow access to the RV doors and engine areas. Stuff sacks are included with all covers.• Thick triple-ply PolyPRO3 top defends your RV from rain, snow, dirt, and scratches for all-season protection• PolyPRO1 fabric on the cover sides for breathable, water-repellent protection• Air vents on both sides• Side zippered access panel• Adjustable front and rear tension panels• Elasticized hem corners• Integrated undercarriage strap system Adjustable tension panels & elasticized hem corners for a custom-like fit Air vents reduce wind stress & inside moisture Integrated straps & a toss bag system for quick installation | Classic Accessories PolyPRO 3, Deluxe Travel Trailer Cover, 35'-38' in Grey