TUMO 3/2mm Full SuitMaterial: GEOPRENE BY YAMAMOTO (98% water impermeable, typically lasts 4 5 years, 2 year warranty and dries in about 1 hour.) The Tumo is named after the Buddhist meditation Technique where naked Monks sit in the snow, underneath a wet blanket, and dry it out with their own body heat. So jump into the coldest environments. The Tumo wetsuit has you covered even if you don't meditate. HIDDEN CHAMBER: Geoprene with built in air chambers: stores radiant