This is the Aqua Lung Men's 2mm Aquaflex Vest for Scuba DivingFeatures: 2mm 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. "