Must-have rack pads for keeping your board safe on your roof rack Padding where you need it. These aero rack pads put plenty of padding against your board while leaving a more aerodynamic profile under the crossbar than a traditional pad. Easy to use hook-and-loop closure secures them in place. The XL width is designed for larger SUVs and truck racks. The heavy-duty build handles the wear and tear of sun and weather. Fits wider/ thicker rack cross bars Only pads top of bar for sleek fit Durable UV resistant 600D polyester material Hook and loop closure 65% Polyester, 14% Neoprene, 13% Nylon, 7% Spandex, 1% Polyurethane 18″ [ 46cm ] long pad – Set of two.