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