Onyx Impulse AM-33 AutomaticManual Inflatable Life Jacket The Onyx Impulse Inflatable life jacket is able to convert from automaticmanual to manual inflation only. The front zipper closure has a low profile design for a secure fit without sacrificing mobility. Once hitting the water the water soluble bobbin the vest will automatically inflate. In manual mode simply pull the secure pull handle for quick inflation. This is a US Coast Guard Approved Type V inflatable life jacket. Features Marine wh