70% M-Flex 1.5mm neoprene vest; is ideal for wet, active boats in moderate-weather conditions. Airprene flowzone on the back provides an additional cooling feature for maximum comfort and breathability. Soft neoprene and clever thickness distribution have been used in the design to improve performance. Can be worn as a single layer against the skin, or as an outer layer for extra wind and water protection. Combine with a long john in boats where maneuverability is key.