Side Air Curtain (if equipped)
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The side air curtain is a single-stage airbag which is designed to provide head and upper body protection to the vehicle occupant(s) during certain crashes.