Zone3 Mens Aspire Thermal High Flex Open Water Swim Wetsuit | 2021 This suit is one of the best open water swim wetsuit on the market to date! Designed with a 1.5mm shoulder chest neoprene this suit offers insane mobility and optimal functionality. This suit is super warm and has been made with a rolled collar construction to trap heat and prevent water from getting in. A well thought through thermal fleece lining has been used in this suit to protect the important muscles that require special attention when swimming long distances. Fatigue in the shoulders while swimming has been achieved by making the suit entirely out of light and flexible Yamamoto materials. Features 1.5mm shoulder and chest neoprene Rolled collar construction Made with 100% Yamamoto materials  SCS Nano coating Pro-speed cuffs to ensure easy removal.