This amazing tri wetsuit has only been worn twice. Great for cold water swims! The front of the Vortex Fullsuit is 5 mm, which is the maximum legal thickness and provides the maximum buoyancy during your swim. The back is 3 mm, for flexibility throughout each stroke. The Vortex Fullsuit continues to be updated, with over 20 different panels in the body, arms and shoulders to get you in an optimal body position.