You can't go wrong with Aqua Sphere's Racer wetsuit! Male fit. Bio-Stretch Zone: Strategically placed 1mm stretch zone - allows for max range of motion Auto Positioning Sleeve: 5mm band - encourages high elbow position on pull phase of stroke. Power Zone: Strategically positioned sections of the forearm, externally coated with a super-stretch material engineered to increase traction during the pull phase of the stroke, maximizing forward propulsion. Aqua-Drive Technology: Strategically placed panels designed around the core of the body, which acts as the primary planing suface while swimming. Aqua-Drive is engineered to maximize buoyancy, resulting in improved body position in the water which reduces drag and increases a swimmer's efficiency. Grip Protection System: Specially designed fabric application that minimizes friction and creates a shield over the wet suit in order to maximize the life of the suit. Quick Drying Aqua-Flex Collar: Watertight seal with maximum comfort throguh its double layer, ultra-fine design which minimizes neck chaffing 100% UVA/UVB Protection Super Stretch Fabric Yamamoto #39 SCS Material: Yamamoto 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: Thermo-Guard technology provides warmth and maximum flexibility and range of motion in the shoulders, legs and chest.