Specially designed covers for Class C RVs feature triple layer PolyPro III top that resists rain and vents water vapor out. Cover Type: RV, Material Type: Polypropylene, Zippered Access: Yes, Elastic Corners: Yes, Air Vents: Yes, Storage Bag Included: Yes, Tie-Downs Included: Yes, Fits Length (ft.): 29 - 32 Prevents mold, mildew and ice buildup Adjustable front and rear tension panels provide a custom-like fit Includes rear ladder cap