The J-Cradle design of the Yakima HullRaiser holds any kayak securely on its side. You'll have easier access to gear stored in your boat, and more room on your crossbars for bikes, cargo boxes, and other boats. Universal cradle design fits any kayak. Includes two padded Heavy Duty Straps to secure the boat. J-Cradles mount directly to round or square crossbars, or to factory racks using Yakima MightyMounts (sold separately). The base pads are made of Dynaflex™ and the upper pads of closed cell foam, for protection of your boats finish.