The Classic Accessories PolyPro 3 Molded Fiberglass Camping Trailer Cover, 13' - 16' is a great way for your RV to brave the elements. Made with triple ply PolyPro3 fabric that repels water and protects against dirt, UV rays, snow, nicks and scratches. An air vent system and quick drying fabric combine to reduce wind stress and vent's inside moisture. The PolyPro 3 Molded Fiberglass Camping Trailer also provides you with adjustable front and rear tension panels and elasticized hem corners that give your RV great custom fit. The PolyPro 3 Molded Fiberglass Camping Trailer is a great way to protect your RV from any weather.