In the weaving process, a certain amount of elastic fiber (usually spandex) must be added. For example, Lycra (in fact, a kind of spandex from DuPont) is the best material for skin, generally not the whole pair of socks are made of Lycra Many socks indicate that they are limited to the socks.) The toe, heel, and crotch are often made of man-made fibers for reinforcement and elasticity. The two add up to about 15-40%. So what we call pure cotton (cotton) socks means that the yarns other than elastic fibers and hanging threads are all cotton.
2. The thickness of the socks is not necessarily related to foaming. Wearing two-layer socks will make it easier to slip, and the feet are naturally more likely to foam.
3. It is best not to use a washing machine to clean the socks, which will make the socks lose their elasticity, and do not soak them for more than 20 minutes.