The Sea To Summit Traveller Soft Racks are for instances where...maybe, your vehicle doesnt have a permanent roof rack. Or you share vehicles and one of them doesnt have a roof rack. Or youre traveling, and you dont want to pay extra to rent a vehicle with a roof rack. Sea To Summit's Traveller Soft Racks are a quick and easy way to get your sporting equipment on the roof and off to your favorite destination. Available in two sizes, the large Traveller Soft Racks are ideal for large canoes, wide beam watercraft, or SUP boards while the regular size is best for smaller craft. They are compatible with any tie-downs.