What is the mid layer? It’s an intermediate layer where the clothes add extra insulation and thus insulate the body heat. When in cold temperatures with low activity, a thicker layer is needed to keep the body warm. The aim is to create an air layer that insulates by trapping in the body heat. The more air in the clothes, the better the insulation. Woolpower’s sturdy reinforcement garments are made of Ullfrotté Original 400-600.
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