When the vapor emanated from the skin surface can not easily permeate to the air, it will form a high humidity region between the skin and the fabric which makes people feel mugginess and discomfort.

当人体表面散热蒸发的水汽不易透过陆续排出时,就会间形成高湿区域,使人感到闷热不适,因而服用尤其是内衣,必须具备良好的吸湿透湿性能。