The airbag refill developed by In&Motion has been designed to guarantee an ergonomic shape and a large volume of gas for optimal protection. Thanks to an air volume trapped in 4 small cartridges, the system keeps a discreet and comfortable shape. When triggered, the 4 small gas cylinders contained in the cartridge instantly empty to inflate the entire airbag. A gas cartridge contains 4 cylinders. One cartridge = one trigger.