This is the Aqua Lung Women&';s 2mm Aquaflex Vest for Scuba Diving Features: 2mm Super Stretch neoprene throughout High stretch AquaFlex neoprene All seams are glued and blind-stitched All edges have binding tape for a finished look The AquaFlex Vests are a popular accessory to provide additional warmth to any of our jumpsuits. The Aqua Lung Vests are made with various thicknesses of Super-stretch neoprene to provide maximum insulation in high heat-loss areas, while making the vest easy to don and doff.