Bumper-Pull Horse trailer 10＊1∪ to 12＊Contour fit RV covers, zipper entry panels and SFS aqua-shed top polypropylene sides. Great cover for regions with moderate moisture and moderate sun. Highly water resistant 3 ply SFS aqua-shed top sheds water and is breathable. Passenger side zipper entry panels allow access, regardless of door position.Measurement Instructions: To ensure proper fit, measure coach length, including ladder. Do not rely on manufacturers specifications to determine actual RV length. Do not include propane tanks or hitches. ADCO RV covers are made to accommodate rooftop accessories. If in doubt, go to the next larger size. Front and rear cinching system will take in the extra material.