CHECK THE SIZE CHART (in the image section above) SwimRun is one of the fastest growing sports in the world, the new SR1 men's wetsuit from 2XU has been designed specifically for this exciting new sport. The 2XU Pro-Swim Run SR1 wetsuit provides buoyancy and speed through the water, abrasion resistance during transitions, flexibility through the hips and legs, and ventilation via the long front zip for cooling you off during the run. This wetsuit has been constructed using the world's most flexible and desirable swim neoprene, manufactured in Japan from ecological limestone, rather than oil-based materials. 2XU's patented closed-cell neoprene rubber has an expansion ratio 7 times greater than that of conventional wetsuit materials, providing enhanced comfort and an unprecedented range of movement while swimming, diving, or running. Features:The suit uses Hyper stretch double-sided nylon for durability and speed through the water. Hyper flex 1.5mm shoulder and underarm panels for unrivalled swim flexibility. Roll bar inserts for increased balance and greater distance with each swim stroke. Rear panel double-sided nylon for abrasion resistance over rough terrain. Flex hip and pelvis panels for flexibility on the run. Large rear pocket to hold all of the race essentials. 8mm upper leg buoyancy inserts. Long front zip easily accessible for increased ventilation