Covered Wagon Advanced Class A RV Cover 33'-37' Weatherproof Zipper tabs at every entry point give convenience and ease of access to your RV without removing the cover. Double pair weatherproof stitching at all seams for extra strength protection and durability. Adjustable tension strap panels help the fabric hug to the contours of the RV for an extra taut fit. Strategically tailored wind vents aid to reduce lofting and circulate air to help keep out moisture, which leads to mold or ice buildup. 3 Year Limited Warranty