CHECK THE SIZE CHART (in the image section above) The Men's Head Swimrun Race Wetsuit has been designed for combined swim and running performanceThis Swimrun suit has a base of 2mm extremely flexible neoprene that provide great mobility and ensures free movement in hips area whilst running. 1.5 mm neoprene around the arms and shoulders allows for extra flexibility and ease of movement. 4mm Air cell-panels are used on the chest and 6mm panels on the upper thighs to give greater buoyancy and optimal swim position when swimming with shoes.A Head Glide skin coating provides minimum resistance through water. Front and back zipper for easily "cabin down" whilst running. Two easily accessible inner pockets allow for carrying extra equipment.Nylon panels are placed between the legs to reduce the frictional damage that could occur when running with the Swimrun Race suit on. Comes with an convenient and effective whistle for security.A great choice for any swimrun racer.