Leader Accessories Class a Rv Cover Fits 37-40ft Heavy Duty 300d Polyester Outdoor Protect Material:High quality heavy duty 300D ripstop polyester,100% polyester,more durable,not easy to aging 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 Size: 490"L*106"W*120"H,fits Class A RV 37'-40',come with 3-year warranty