This is the Poseidon One Wing 50 Single Tank BCD Wing in One DesignFeatures: Lift capacity of 225 N ClamRetract system Three dump valve Inflator with a stainless steel mechanism Narrow air passage behind the neck The One Wing is made for equipment with a negative weight in water that does not exceed 19 kg (41.6 lbs) and has a lifting capacity of 225 N. When deflated, the ClamRetract system helps to reduce size and drag to the minimum. Three dump valves and an inflator with a stainless steel mechanism ensure inflation and deflation is always controlled and safe; and the shape of the bladder compensates for the weight of the tank when submerged and gives you freedom to move in any direction. The narrow air passage behind the neck is designed not to impede head movement or foul regulators and hoses when inflated. "
