CHECK THE SIZE CHART (in the image section above) The Men's Dare2tri SwimRun Fast is a great choice for the serious athlete. Utilising advanced materials such as 0.7mm DuraflexTM under arms construction and 44Cell stability panels. GlideskinTM Technology and AquaGripTM further adds to the improved performance of this wet-suit. Specifications: 0.7mm patented DuraFlexTMunder arms2.0mm arms construction5mm 44Cell stability panelsSuper light 44Cell HBF-Limestone neopreneGlideSkinTMsurface coatingUnique front neck closure2.0mm AquaGripTMpanelsYKK stainless steel front zipper FLEXIBLE 0.7MM UNDER ARMS & 1.5MM ARMS AND SHOULDERSUltra-thin 0.7mm DuraflexTMneoprene reinforced with an UltraFlexTM lining under arms and 1.5mm HBF-Limestone neoprene for the arms and shoulders construction gives the swimmer a 360° rotation of the arm with little resistance, allowing the swimmer to reach further with less effort.This benefit is multiplied as it reduces upper body fatigue over longer distances. STABILITY PANELS: 5MM Made from HBF-Limestone neoprene, these stability panels help you adopt the ideal swimming position in the water. UNIQUE NECK CLOSURE The velcroclosure on the rear is reversed so in the event the suit is closed incorrectly, only the soft material touches the skin. DOUBLE FRONT COLLAR: 2 X 1 MMA double layer GlideSkin front collar prevent water ingress and allows movement that limit skin friction. AQUAGRIPTMPANELS: 2.0MMGrip panels on the inside of the forearms. The deep ridges in the grip panels reduce water turbulence and increase the surface area, leading to better propulsion around the forearms. UPPER CHEST PANEL 3.0MM This panel allows extra freedom of movement to the arm during the stroke. YKK ZIPPER Theworld's 1 zipper brand is utilized with a stainless steel runner. The zipper runs in a bottom-up configuration. LOWER YKK ZIPPER The world's 1 zipper brand is utilized with a stainless steel runner. The zipper runs in a bottom-up configuration and is 5 cm longer and sits lower on the back. This eases and speeds up sliding the suit around the hips.