Aqua Sphere Women's Pursuit Sleeveless Wetsuit Bio-Stretch Zone  Strategically placed 1mm Stretch Zone allows for the maximum range of motion Aqua-Drive Technology  Strategically placed panels designed around the core of the body, which acts as the primary planning surface while swimming. Aqua-Drive is engineered to maximize buoyancy, resulting in improved body position in the water which reduces drag and increases a swimmers efficiency Aqua-Flex Collar  Watertight seal with maximum comfort though its double layer, ultra-fine design which minimizes neck chaffing Yamamoto #38 Yamamoto Neoprene offers the optimum balance of flexibility, reduced drag coefficient, and durability. The SCS coating offers the lowest drag coefficient available and maximizes speed Thermo-Guard Technology - provides warmth and maximum flexibility and range of motion in the shoulders, legs and chest