The NRS Siren is the most comfortable low-profile women's life jacket available today. Its six panel design effortlessly wraps around your body while soft, anatomically sculpted foam accommodates your curves. Ultra soft foam is divided into six independent panels, allowing it to conform to your body and flow with your movements. The raised foam panels of our Cool Flow System (CFS) provide ventilation along the spine for increased comfort on warm days. Six adjustment points provide a custom fit for any body type. Tough ripstop nylon adds durability in high-wear areas. Soft, stretchy mesh improves comfort in key zones -- the upper chest and around the arm openings. A large zippered front pocket holds all your essentials. Behind the front pocket is a comfy fleece-lined handwarmer pouch. Wide padded shoulder straps eliminate pressure points. A knife lash tab, shoulder strap garages and reflective piping round out the features. This jacket carries the US Coast Guard Certification, through testing by Underwriters Laboratories (UL) . Design flotation: 16.5 lbs.