Flintonic Heated Socks, Rechargeable Heated Socks for Men and Women, Foot Warmer Heating Socks with 3 Adjustable Temperatures, 2200mAH Electric Foot Warmer Warm Socks for Skiing Outdoor.

["Built-in non-fading heating system Heated socks fully integrate the heating wire and power cord into the body of the sock through a new weaving process, comprehensively improving the appearance, elasticity, and durability of the heated socks. Heated socks keep the instep, top, and sole warm." "Three heating modes Heated socks can be heated. There are 3 heating modes, high-temperature heating (55°C; can work for 3.5-4 hours), medium-temperature heating (45°C; can work for 5-6 hours), low-temperature heating (35°C; can work for 7-9 hours). You can select temperature settings according to different temperature environments." "Stretchable and machine washable Heated socks for men and women have strong elasticity, suitable for both men and women, and most people. Heated socks are a great winter gift for yourself, your family, and friends. (The heated socks are machine washable. Please remember to put the heating socks in the provided laundry bag before washing and do not wring by hand)" "Electric heated socks The rechargeable improved electric heated socks are equipped with high-quality alloy heating wire instead of traditional carbon fiber wire. Heated socks keep you warm in winter while improving circulation. Ideal for people with arthritic feet, chronically cold feet, and joint stiffness." "Note Do not wear during strenuous exercises. Do not wear while sleeping to avoid overheating or long-term use that can cause mild burns. Keep away from open flames and high-temperature sources such as heating pads and heaters."]