There are many kinds of materials of underwear, common are: Cotton: cotton underwear soft and comfortable, good air permeability, strong sweat absorption ability, no stimulation to the skin, not easy color fading. But cotton underwear has a certain shrinkage rate, should pay attention to shrinkage and deformation. Artificial fiber: such as polyester, nylon, has excellent antistatic property, easy to dry, not easy to wrinkle, not afraid of water, light. However, the air...