The new Sonar provides the perfect mix of flexibility and buoyancy - now offering flexibility, which some brands reserve for their elite wetsuits, at an intermediate budget. Carefully placed Aerodome2 panels lift the body into the most efficient swimming position, saving you precious time in the swim. If you've been a fan of the Sonar over past years then this season's evolution is one you don't want to miss out on! . Its seal represents quality, technology and innovation. 39 CELL: Yamamoto 39cell is an extremely flexible neoprene which supports an uninhibited natural swimming motion.