The layer system explained in three layers

Short answer: Innermost a layer that moves moisture away, in the middle a layer that holds the warmth, outermost a layer that stops wind and rain. Each layer has one job.

The inner layer

It lies against the skin and has to carry sweat away. Bamboo viscose works well here because it absorbs moisture and does not smell quickly. It should sit close without squeezing. See bamboo underwear for men.

The mid layer

It holds the warm air the body produces. A sweatshirt or a thin fleece does the job. The more air there is in the fabric, the warmer the layer. See bamboo sweatshirts for men.

The outer layer

It stops wind and water. It does not have to be warm, only tight. Without it the two inner layers go cold in ten minutes in a wind. See bamboo clothing for men.

Frequently asked questions

Can you skip a layer

Yes, when the weather allows. The system is a tool, not a rule.

Why is cotton bad as the inner layer

Cotton holds the moisture and goes cold against the skin when you stand still.

How many layers in winter

Three is enough for most people. Four if you stand still outdoors for a long time.