Classic Accessories 70413 Grey Polypropylene RV Cover, Fits 28' - 30' RVs Fits 28' - 30' RVs Elasticized bottom corners for a fast custom fit Rugged polypropylene material is water repellent yet breathes to reduce mold and mildew Mildew resistant Rugged polypropylene material is water-repellent, yet breathes to reduce mold and mildew