The sweat absorption effect of socks is very important, because most of the hiking shoes have no ventilation function, and the sweat on the feet will gradually gather until the shoes are taken off. Socks made of synthetic fibers (including polyester, nylon, and acrylic) dry more easily than wool socks.
Most climbers wear two pairs of socks, with thin inner socks on the inner layer, which can drain sweat to the outer layer and keep the feet dry. The outer layer of socks is generally thicker and rougher, which can absorb moisture from the inner layer of socks, and can also be used as a pad to prevent foot injuries due to friction.
Of course, there are many exceptions. Some rock climbers want to enhance the fit of climbing shoes, so they don't wear socks or only wear one layer; hikers wear only one layer of socks when they wear hiking shoes in summer to keep their feet cool. It is important to pay special attention to whether there is enough space for the feet when wearing multiple pairs of socks. If socks hinder blood circulation, no amount of socks can keep warm.
Before putting on socks, you should wrap a protective twill or sports tape on your heels and other areas that are prone to blisters. This is very useful when you wear new boots or when your skin has not become tender for a long time. In addition, spraying powder to keep the feet dry is also a way to prevent blisters.
Gore-Tex socks with waterproof and breathable function can increase foot comfort in humid environments. Put a pair of Gore-Tex socks on top of ordinary socks. This is the same as wearing Gore-Tex film shoes, which can get a higher level of comfort.
In expeditions or extremely cold weather, a layer of socks can be added between two pairs of socks to block water vapor. This kind of socks is waterproof but not breathable, which seems to go against the previously mentioned wearing principles. We still use the example of using a styrofoam cup to hold hot coffee to illustrate. Although the lid of the cup prevents the outflow of water vapor, it also plays a good role in keeping warm, so that the coffee does not cool too fast, and the socks that block water vapor are similar. : The feet are wet, but the temperature does not drop rapidly. Socks that block water vapor are most suitable for wearing in extremely cold weather, which can reduce frostbite, but if moisture stays in the boots for a long time, it can cause serious trench foot disease. If you wear socks that block moisture, let your feet dry thoroughly at least once a day.