Seaver SafeFit Airbag Vest - Current GenerationProtection for the daily life of riders The SAFEFIT airbag vest is delivered with a CO2 gas cartridge, an arming key, its connection strap and its connector cord. The latter, attached to the knives of your saddle, ensures the connection between your airbag vest and your saddle thanks to the connection strap directly linked to the gas cartridge. In the event of a fall, the gas cartridge is disconnected from the vest: it is this mechanism that triggers