Shields your RV from the elements? sides, front and back are made of three-layer non-woven polypropylene; the top is a three-layer material made of non-woven polypropylene and DuPont? Tyvek®.Fits Toy Hauler, 20?-24?Zipper entry doors for easy access during covered storageCovered air vents help prevent trapped moisture and mold; air vents keep the unit cooler and prevent billowing in high windsFront and rear cinching straps reduce loose fabric; underbelly strap system provides a secure fit
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