The Onyx A/M Auto or Manual Stole IPFD automatically inflates upon immersion in water or when the wearer pulls the "Jerk to Inflate" handle. It is also equipped with back-up oral inflation and is convertible from Auto/Manual inflation to MANUAL ONLY inflation. It provides comfort, safety and peace of mind without knowing you have it on, until you may need it. The comfortable, lightweight, low profile design features a soft neoprene neckline for all day comfort. The durable fabric resists tears and punctures. This vest is For persons 16 years of age and older and weighing over 80 lbs. It is not recommended for non-swimmers or weak swimmers. This vest provides a minimum buoyancy of 22.5 lbs. when inflated. For replacement CO2 cartridge, use Onyx A/M-24 Rearming Kit #1352. This life vest is a U.S. Coast Guard Approved inflatable life jacket.