Manually inflates when wearer pulls the "Jerk to Inflate" handle. Compact style allows for total freedom of movement. Perfect for standup paddle boarding, flat water paddling, fishing, sailing, hunting or recreational boating. Zippered pocket. ReliaPull Guide for predictable inflation; assists in repacking. Universal sizing fits adults over 80 lbs. Use Onyx rearming kit 1350. Not approved for children less than 16 years of age.