Durable Construction: Constructed with Premium re-enforced 500*500D PVC Tarpaulin, this carrier, featuring detachable design of ratchet straps and upgraded anchor points(double stitched), is dust, grit and scratch resistant. All-weather Performance: Featuring IP-X3 weatherproof with welded seams, waterproof zipper, prolonged sealed area and velcro zipper flap, this UV-stable carrier with coated repellent substance lets you travel with peace of mind in any conditions. Super Storage Capacity: Expandable to 48"L x 35"W x 20"H, it offers 20 cubic feet capacity, providing spacious storage for your big and bulky luggage. Soft-sided design makes it be able to accommodate your odd-shaped items. Aerodynamic Design: Our product is designed to have a streamlined body that greatly reduces wind drag and power consumption, and improves the stability of carrier, which leads to lower gas cost and less noise during the travel. Flexible Installation: This cargo bag, a great alternative to a permanent truck lid or a bed cover, works on roof racks, cross bars, side rails, baskets and truck with accessories including storage bag, ratchet straps, bungee cords and roof mat.