What Our Gearhead(R) Experts Are Saying:"I recommend this suit for athletes who swim in seriously cold water but still want race-level performance. The zirconium liner noticeably boosts warmth, and the seamless shoulder panel keeps your stroke smooth even during longer open-water sessions."We step into cold water knowing the first few strokes will sting before rhythm takes over. The blueseventy Thermal Reaction Wetsuit helps keep the chill at bay, letting us focus on efficient movement and steady breathing as we push through open water. Built with premium Yamamoto neoprene and a thermal zirconium liner, the Thermal Reaction Wetsuit provides insulation and flexibility for demanding cold-water swims. The soft interior lining retains body heat while drying quickly between sessions, helping maintain warmth during long training days. A seamless single-piece shoulder panel allows natural arm movement through every phase of the stroke, while ultra-flexible arm panels reduce resistance for efficient power in the water.