[Black |  Approx. 11.0 x 3.5 inches (28]

[Red |  about 28 x 9cm]

(Keeps Feet Warm) The heated insole warms your entire foot and eliminates discomfort in cold weather. High-strength, super-soft composite carbon fiber heating element keeps feet at the ideal temperature, effectively heat from heel to toe, and protects feet from cold bottom. This insole can solve the problem of cold feet in the middle of winter, and keeps out the cold.
(3-stage temperature adjustment) High temperature mode reaches 122 - 122°F (50 - 55°C), operating time is about 2.5 - 3 hours; medium temperature mode reaches 142°F - 122°F (45 - 50°C), and the usage time is about 3.5 - 4.5 hours. Adopts a high capacity polymer battery that is safe to use while keeping warm and maximizing use.
【Comfortable to Wear and Cut Free】Made of high quality Osleay + microfiber, it is soft and comfortable to wear. We have added a cut-line design and can be cut to fit a variety of footwear, and can be cut to fit your foot for the best fit, fit your feet more comfortable.
USB Rechargeable: The rechargeable design reduces the power cord binding and makes it more convenient to use. USB portable charging, more convenient to charge, just plug in your power bank (except power bank) or adapter. The USB connector allows you to connect your computer, power bank, power adapter, and car charger with USB connector.
Great for winter days. Can be used not only for touring and driving, but also for a variety of occasions such as office, work, and home. The electric heated insole is a great helper to keep your feet warm. Recommended as a Christmas gift for your family and friends in the winter.