airbag
Indeed, the airbag is actually one of the most importran safety features in today's advanced cars, and intended to protect you during a crash. In reality, an airbag is essentially a rapidly-inflating pillow that cushions the driver (and other occupants) to varying degrees in certain kinds of crashes. Tech-wise, the airbag has sensors that detect deceleration (a change in momentum) and deploy inflation in just milliseconds. Usually being built out of nylon fabric, the bags are hidden inside such car equipment as a steering wheel, dashboard or door. Known as an Supplemental Restraint System (SRS), they complement seat belts in improving safety during front, side and even rollover collisions.