"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. Tie-Downs Included Yes, Fits Length ft. 30-33, Product Style RV Class A, Zippered Access Yes, Storage Bag Included Yes, Air Vents Yes, Material Type Polypropylene, UV Inhibitors Yes, Top Layer qty. 3, Elastic Corners Yes, Side Layer qty. 1, Cover Height in. 140. Includes rear ladder cap Color is Grey / White Class A"