The processing techniques make this material highly windproof. The Windproof 80 material is constructed in such a way (close weave, finish or processing) to make it 80% windproof. The big advantage of these partly wind-penetrable materials is that they are very breathable. The wind penetrating the jacket is weakened by an incorporated “material barrier”. This has a pleasant cooling effect and transports moisture outwards. You just have to be careful in a very cold wind, as the wind chill factor in an 80% windproof jacket can cool the body right down. Windproof 80 is therefore particularly suitable for active mountaineering in windy but not stormy weather.
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