Leader Accessories Class A RV Cover Fits 33'-37' 3 Layer Polypro Size 453"x106"x120" Fits 33'-37', Size: 453" X 106" X 120" 3 layer polypropylene top fabric keeps out rain and snow while single layer polypropylene side fabric venting inside vapor out Anti-hit reflective panels for added safety at night or while parking Air vents reduce wind stress and vent inside moisture out Extra reinforced corners with elasticized hem for custom-like fit and prevent tearing of your cover