When you go to climb mountains will it rain, cold not the d, can never umbrellas up the mountain! Mountain climbing is a very consumption physical exercise, a large amount of sweat, and the mountain of the average temperature is very low, always can't take the suit off it. So, how about solving the problem? In fact, people have long in studying the problem, that is wearing a both waterproof and moisture permeability clothes. (usually people often called it breathable fabric, but not in the air the gas, but sweat out of evaporation steam).

Specifically, waterproof breathable fabric is refers to the water under some pressure don't dipped into the fabric, and the affects of the human body to the water vapor but sweat form through the fabric transmission to the outside world, to avoid sweat accumulation of the body and condensation tissue.