Expedition RV Trailer Cover Fits Class A 37&#39; - 40&#39; RVs Zippered Panels Let you access the front, Back and sides. Roll up and velcro into place. Measurements: 492"L x 105"W x 120"H Super Duty UV Fabric With Elastic Corners. Quick Release Buckles Vented Triple Layer Roof allows the moisture out , while keeping the dryness in. Marine grade tie down loops.