Kent AM-33 Orange AutoManual Inflatable Life Vest The Kent AM-33 Orange Inflatable Life Vest has the capability to convert from automanual inflation to manual only inflation. While in automanual mode, this life vest will automatically inflate upon immersion in water. The wearer can also pull the jerk to inflate handle to manually inflate the vest. In manual only mode, the vest will only inflate when the handle is pulled. The user friendly design ensures you can quickly and easily rearm the life