The Yakima WindShield Fairing mounts to drastically reduce wind noise, moving air flow up and over racks. This universal fairing quickly attaches to StreamLine (TM) System bars, or any other aero, round or square bars, including most factory crossbars. It uses new-to-the-category, fully adjustable, band-style clamps. It's easy to adjust with the included tool. Also a great place to show off your sticker collection.