The first picture is a product picture, the other pictures are sample displays Note: 1: Due to the different colors displayed by different computers, the colors of the actual items may be slightly different from the picture above. 2.Due to manual measurement, there may be slight deviations, but it does not affect the use. Description: Principle: the 35 degree constant temperature socks are made of cotton and polypropylene. The outer layer is pure cotton and the inner layer is health fiber. Adding elastic fiber can give full play to the health care function of health fiber and increase the moisture permeability and air permeability of socks. Under the stimulation of the environment temperature and human body temperature, it can produce energy which is easy to be absorbed by human body. It can enhance the vitality of human cells, promote metabolism, effectively improve microcirculation of human body and inhibit bacterial reproduction  【Great for outdoor activities】skiing, snowboarding, hiking, hockey, and other sports. Specifications: Fabric Name: aluminum plated fiber Applicable gender: Male / female Color: black Size: one size fits all Package Included: A pair of socks