USB Electric Heated Insoles Comfortable Feet Warmer Temperature Controller Foot Warmer for Men and Women (39-40)

Easy to use: simply use it with a computer or a mobile power supply via USB cable, a very good accessory for computer workers in the cold winter. Washable: the heating pad can be cleaned, dried safely before use. Excellent workmanship: soft and durable design made from soft, lint-soft materials for years of shock-absorbing comfort. Features: the heating is stable and safety is guaranteed. The insole is available in different sizes for a variety of shoes. Three heating modes: USB interface, power supply and power bank.