With its womens specific design and six panel construction, the NRS Womens Siren PFD delivers low profile, comfortable performance.. . . . . Ultra soft, six panel, womens specific foam construction conforms to your body without hindering movement. Cool Flow System provides ventilation along the spine for increased comfort on warm days. Six adjustment points to ensure a comfortable and secure fit. Combination of tough nylon ripstop in high wear areas and soft stretchy mesh in key zones provides the perfect balance of durability and comfort. Zippered front pocket for securely storing essential items. Comfy fleece lined hand warmer pouch. Lash tab securely holds your rescue knife. Reflective piping for increased low light visibility. Sizes: XSM 30 42 in. LXL 42 52 in..