The back mounted Nick Buoyancy Compensator from Seac is lightweight and allows maximum freedom of movement. The interior bladder is constructed with laminated 500-Denier Cordura, which is highly resistant to tears and cuts. Outer bladder is Cordura 500D coated with polyurethane (PU). Ergonomic back pad and an adjustable independent waist strap add to the back inflators comfortable secure feel. Two low-drag hidden backup pockets hold gear and accessories out of the way. Power inflator includes Sphere Valve Control System for improved reliability. Inflator comes standard with a 3/8" threaded low pressure quick-disconnect hose. 3 dump valves (inflator, shoulder & back) provide trim in any position.