Nano technology comes to base layers, in this case through a plasma treatment that causes moisture to wick immediately into the fibres and away from the skin.

It is just warm enough to extend the comfort range of your favourite Castelli garments, but it looks good enough to be worn on its own for off-season cross training.

The ultimate base layer with weightless wind protection.
The soft SG0.6 Wind fabric will wick to keep you dry and comfortable with smooth shoulder layering.

SGO.6 Wind is one of the lightest fibres used in sports nowadays. The reason it's so light is simple, it's half empty. Every Polypropelene fibre used in SGO.6 is hollow, this traps air to provide lightweight insulation. This amazing fabric is also designed to prevent water absorption, so it stays light when other fabrics soak up water and become weighted.

The perfect base layer for racing in cold conditions.