The "Offshore Pro 150 HAMMAR" includes the HAMMAR MA1 hydrostatic automatic inflation system. Ideally suited for ocean going yachts as the jacket won't inflate from large amounts of spray as a normal automatic jacket may do in wet conditions. It is a compact length jacket that has been designed for the active adult boater who wants maximum freedom of movement and wearer comfort. - HAMMAR hydrostatic automatic inflation system with window for visual checking of the arming status - Velcro closure. 150 Newtons of buoyancy - Compact design and ergonomic shape for ease of wear - Soft neoprene collar for maximum comfort during active use - Reflective piping for night time visibility - D buckle attachment at the back - for fitting optional crotch strap - Australian standard approved AS4758.1