"Adjustable front and rear tension panels provide a custom fit. Repels rain and snow, yet vents inside water vapor out. Prevents mold, mildew and ice buildup. Elastic Corners Yes, Air Vents Yes, Material Type Polypropylene, UV Inhibitors Yes, Side Layer qty. 1, Cover Height in. 140, Tie-Downs Included Yes, Top Layer qty. 3, Product Style RV Class A, Zippered Access Yes, Storage Bag Included Yes, Fits Length ft. 30-33. Includes rear ladder cap Color is Grey / White Class A"