Scubapro Seahawk BCD with Air 2 5th Gen Constructed of 1000 denier nylon and 420 denier nylon for maximum durability. Positioning the air cell behind you creates exceptional freedom of movement while reducing bulk. This decreases drag, making finning through the water column that much easier. Compression straps rein in the air cell when it is deflated and contribute to optimum volume control. Three-dump deflation system lets you to expel air from a variety of underwater positions. Rotating quick-release shoulder buckles allow you to optimize the routing of your shoulder straps to maximize fit