Swimming with a triathlon wetsuit at temperatures below 15 or 16 degrees should only be done by experienced swimmers. In competition, wetsuits are compulsory for all participants at temperatures below 15.9 degrees. At temperatures up to 21.9 degrees for swims up to 1,500m and 24.5 degrees for longer swims. It is allowed to wear a wetsuit for swimming. Higher temperatures will result in a neoprene ban.