Leader Accessories 5th Wheel RV Trailer Cover Fits 37'-41' Triple Layer Polypropylene 498" L102 W120 H Size: 498"L*102"W*120"H, Fits RV 37'-41' Material:Thick, triple layer polypropylene top fabric keeps out rain and snow yet vents inside water vapor out Adjustable front and rear tension panels and elasticized hem corners provide a custom fit Zippered panels allow access to the RV doors and engine areas Air vents reduce wind lofting and inside moisture,come with 2-year warranty