CHECK THE SIZE CHART (in the image section above) The Women's Black Marlin is Heads most advanced Tri wetsuit, the suit is made of an extremely flexible neoprene with unique compression around the core. 4 mm air cell panel on the front gives you optimum buoyancy and the ideal position in the water. 3 mm panels below the knee allow for a more effective leg kick and 1.5 mm neoprene around the arms and shoulders allows for great flexibility and movement. THe black Marlin Tri wetsuit's new low neck profile for great comfort. The new Head Arrow arm panels maximizes the stroke effect. A Glide skin coating provides minimum resistance through water. Reverse zipper enhances neck comfort and improves the reliability in the water and reduces the transition time in triathlon. The Black Marlin Wetsuit is Heads best wetsuit so far for triathletes and open water swimmers