Nano-technology comes to base layers, in this case through a plasma treatment that causes moisture to wick immediately into the fibers and away from the skin. It is just warm enough to extend the comfort range of your favorite Castelli garments, but it looks good enough to be worn on its own for off-season cross training.

• Nano-plasma fabric actively moves moisture away from the skin
• Layer of air next to skin allows for maximum evaporation
• Minimal seams for maximum comfort