Hit-Air "Motorad 2" model inflatable air jacket in Grey Size XL Inflatable enduro model Hit-Air vest with full ventilation. Activation is simple and automatic. A coiled wire is attached to both the motorcycle and the jacket. Once the rider and the motorcycle are separated, the coiled wire pulls a "key" out of a gas release system and inert gas inflates the air cushion. The inflated jacket provides the necessaryimpact protection. After a few seconds the gas is automatically released through the gas release valve.