Breathability and Air Permeability in Wind Shirts

Breatheability is defined as the ability of water vapor to transfer through a fabric by diffusion. In air permeability, we have actual convective movement of air. Both breathability and air permeability play a role in how much water vapor your rain jacket can pass through its membrane. Backpacking light offers more than 3000 articles about gear skills, philosophy, stories, test reports, trips,. It's also an online course library that covers a variety of topics.