This vented two tone gray cover is breathable, resists to high humidity & rainfall with UV protection, offers moderate weather protection. It is made of 3 layer fabric top & 3 layer polypropylene sides. It fits for 25 to 28 foot length coach & measures 28 foot length x 106 inch width x 114 inch height. It includes zipper entry panels, quick connect buckles, front and rear cinching.