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 26 foot 1 inch to 28 foot 6 inch length trailers & measures 345 inch length x 100 inch width x 102 inch height. It includes zipper entry panels & quick connect buckles.