Features: Built-in Heating System: Heating socks completely knit the heating wire and power cord into the body of the socks through a new weaving process, socks keep the insteps, top and soles warm. Stretchy: Heating socks for men and women have strong elasticity, suitable for both men and women, suitable for most people. It makes a great winter gift for yourself, family and friends. Three Heating Modes: The charging socks can be heated. There are 3 heating modes, higher temperature heating (55°C; can work for 5-6 hours), medium temperature heating (45°C; can work for 7-8 hours), low temperature heating (35°C; can work for 9-10 hours of work). Electric Heating Socks: Heated outdoor socks keep you warm in winter while improving blood circulations. It is great for people with arthritic feet and chronic cold feet and joint stiffness. Wide Applications: These warm and heated socks are perfect for winter outdoor sports, such as skiing, hunting, camping, ice fishing, mountaineering, etc. Specifications: Material: Nylon Color Options: 10 Colors are Available as Shown in the Picture. Package Weight: approx.100g Suggested Footcode: 35-42 Yard Package Includes: 1 Pair Heated Socks note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!