• Made of high quality knitted cotton, these socks are soft and comfortable to wear
• Built-in heating sheet, designed to keep your feet warm in the coldest conditions
• The elastic fabric ensures a snug and comfortable fit for most users
• Three levels of intelligent temperature control (high-medium-low) to meet your needs

Specifications:

• Size: 22.5*33cm (fits for shoe size 36-47)
• Material: heating sheet + knitted cotton

Note: The product itself does not have electricity. To use the heating function, the customer needs to install 6 AA batteries (not included).