The onion principle

The weather and temperature are rarely constant, and body temperature rises under exertion and drops again during rest periods, so it makes good sense to wear several layers of clothing. If it’s too warm you can then take one or more layers off; if it’s cold, you can just put something back on. The onion principle is based on three “base layers”:

Outer layer (shell layer): Protection from the elements


  • Provides protection from wind and weather, is absolutely waterproof, windproof and breathable.


  • In all weather conditions apart from heavy rain softshell is ideal because it combines insulation properties with protection from the weather. We’ve consolidated our softshells under the Windproof rubric.
  • Most softshells are particularly breathable, have an integrated wind protection and are extremely waterresistant, although they are not waterproof. In addition, there are also hybrid products – a combination of waterproof and windproof materials.

Mid layer: Insulating body heat: This layer can be made of different kinds of material. It is best when the clothing is made of synthetic fibres, e.g. polyester fleece materials or PrimaLoft. They absorb very little moisture, and moisture is quickly transported outwards. Fleece materials also pro-vide good insulation even when wet and dry quickly. In addition, they also insulate when wet and are fast-drying.

Inner layer: Transfer layer: This layer is worn in direct contact with the skin. They consist of performance fibers (ie. polyester), merino wool or a combination of both materials. Above all, the first layer of clothing should wick moisture away from the skin to the next layer.

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