NRS Women's Siren PFDThe 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.