GoreTex clothing is a favourite among hikers because it keeps Mather Mature at bay. Unlike nylon, which is waterproof but traps sweat, GoreTex is a “breathable” fabric. It has all to do with a thin membrane embedded in the garment where there are 1.4 billion pores per square centimeter. As each pore is larger than a water vapour molecule, sweat is able to escape through the fabric. These tiny pores also massively reduce the amount of wind that can get in.
This doesn't stop it being waterproof, however. Even though each pore is bigger than a water vapour molecule, it is smaller than a liquid water molecule, so rain is unable to get through to your body.
This doesn't stop it being waterproof, however. Even though each pore is bigger than a water vapour molecule, it is smaller than a liquid water molecule, so rain is unable to get through to your body.
