The Craft Active Extreme Concept Piece is one of the only base layers we know of that is truly optimized for high intensity exercise. So now you can race or put in the hard training while minimizing unwanted heat and moisture buildup.
Craft's "concept" is to apply body mapping technology to locate more breathable fabrics exactly where perspiration and heat tend to build up. The result is a blend of Mesh Superlight and Zero Extreme fabrics. Fit is simply perfect - a very comfortable form fit with a comfortable, light compression. Freedom of movement is optimized so the Extreme concept piece virtually disappears when worn.