All fabrics must be fit for purpose, but not at the expense of specialist care instructions - all fabrics can be machined washed on a regular basis.
An additional process is applied to the fabric during dyeing which allows the garments to evaporate moisture away from your skin keeping you cool and dry.
 
The fabric wicks moisture away from the skin efficiently by evaporation, regulating body temperature. This helps keep you warm when the weather is cold and cool in the heat. Improving performance and recovery.
The outer shell of the garment is a barrier to rainwater preventing it from penetrating the surface, increasing the time before the garment 'wets out', allowing the wearer to stay drier and more comfortable for longer.
2 and 3 layer fabrics specifically designed to be weather proof, keeping you warm when you need it most.