Details: Automatically inflates upon immersion in water or when the wearer pulls the “Jerk to Inflate” handle. Convertible from automatic manual to manual only inflation. Provides comfort, safety and peace of mind without knowing you have it on, until you may need it. Durable fabric resists tears and punctures. Not recommended for non-swimmers or weak swimmers. Minimum buoyancy of 22. 5 lbs. when inflated. For persons 16 years of age and older and over 80 lbs. Comes with a CO2 cylinder.