The basic principle is to create as many layers of clothes as possible and to wear a windcheater on top of everything. What you need to do is trap a maximum amount of air in the thickness of the down or the synthetic fibres used for underwear and polar fleece. Protective clothing against snow and wind. This is made up of two layers of fabric enclosing a Gore-tex or microporous membrane. The aim of this type of clothing is to produce a fabric whose wrong and right sides have different properties so that the usage of the fabric is as efficient as possible.
Body heat acts as a catalyst, pushing dampness far away from the body towards cooler, drier air.
The type of fibres used in polar under-garments thus maintains insulation against dampness and dries quickly.