The Thule AirScreen softens annoying noise by redirecting airflow around your roof rack system, especially when you're driving through strong headwinds at highway speeds. It's fully compatible with Thule's AeroBlade, AeroBlade Edge, and SquareBar racks, with the SquareBar system requiring the included hardware for installation. As a convenient bonus, both the AeroBlade and AeroBlade Edge attach with a system-specific clamp interface. This frees up the T-track underneath, allowing you to mount and remove rack accessories without pulling off the AirScreen.