Is it a contradiction that down jacket fabric is windproof and breathable?

Breathability refers to the penetration of water vapor, and windproof is to block the flow of air, and the two have different penetration principles for clothes. After the air meanders through the microporous membrane of GORET, there is not much energy. This is GOREWINDSTOPPER's windproof principle. For the non-porous membrane, the wind can't pass through at all, so it is naturally windproof.