The S7 is an alternative to the 3.8 for the Progressive Swimmer. This type of swimmer needs extra buoyancy, so the S7 was designed to elevate the position of the triathlete in the water without compromising elasticity when it comes to swim strokes. The perfect tool to make sure swimming doesn't slow you down.The Yamamoto Corporation is the world's main supplier of high performance neoprene. Its seal represents quality, technology and innovation.Yamamoto 39cell is an extremely flexible neoprene which supports an uninhibited natural swimming motion. 39cell extends to a 513% elongation rate, meaning this material is sure to move with you. Added benefits of zero water absorption and zero weight variation can mean only one thing: more speed. A fine balance between buoyancy and flexibility, 39cell is a durable material which will stand the test of time and distance, representing the best neoprene available in it's class.The SCS coating on the neoprene, typical of high-end suits, reduces friction and helps to increase speed. Its micro-cellular structure repels water and creates less restriction when moving forward.The HydroLite panels help the wetsuit come off easier, for faster transitions. This technology, combined with the SCS coating, helps the water slide off your wetsuit, without permeating it, considerably improving your hydrodynamics.The inner Infinity Skin lining provides the feeling of absolute freedom. Designed based on a high-elasticity nylon that incorporates bamboo fibres, this technology is applied to the lining of our wetsuits to offer you greater flexibility with each stroke. This cloth maintains body heat longer, reduces body odor and the appearance of bacteria in your wetsuit. It is also made from natural eco-friendly materials to prevent the appearance of skin irritation and care for the environment.