THERMAL LINING FOR ADDED PROTECTION Our Archimedes IV 3:5 Wetsuit in its unique thermal guise. A marriage of our Flag Ship wetsuit with a thermal lining designed to be warm and smooth to the skin, resulting in the ultimate cold water swimming wetsuit. The fourth incarnation of the ground-breaking Archimedes, the suit that redefined buoyancy profiles to suit the needs of the modern triathlete. The Archimedes IV again takes the expectations of a wetsuit and its material components and shatters the mould, never mind breaking it. With never before seen technology, expectations challenged and conventional materials re-engineered the Archimedes IV leads the way when it comes to triathlon wetsuits. Led by Professor Huub Toussaint and a team of researchers and designers, this wetsuit has been refined to be the quickest wetsuit at the time of release to deliver an impressive 'no-suit' feel. Innovative, buoyant and flexible, the Archimedes IV Wetsuit from HUUB delivers enhanced performance by allowing for maximum stroke efficiency and increased buoyancy so you can move quickly through the water.