Extra strength, lightweight PermaPro ripstop fabric repels water and protects against dirt and sun damage. Air vent system and quick-drying PermaPro fabric combine to reduce wind stress and vent inside moisture. Adjustable front and rear tension panels and elasticized hem corners provide a custom fit. Zipper panels allow access to the RV doors and storage compartments. Long zipper pulls reduce the need for a ladder. Integrated strap attachment and weighted toss bag system eliminates crawling under the RV to install tension straps. Tension panels reduce cover stress when tightening the straps. Zippered storage bag unzips and expands providing five additional inches of height in storage space.