Features: 1. UNIFORM HEATING: Heating the entire sole area of the insole generates heat. Heat evenly to keep your feet warm in all directions and soft and comfortable to wear! 2. KEEP WARM:The heated insole can not only provide warmth to feet but also protect your feet from injury in the cold winter 3. WATERPROOF: The warm insole can be washed directly, We are made of high-end waterproof materials. They can be washed directly without affecting the effect, They need to be completely dried before use. 4. LONG-LASTING: It has a high-temperature heating effect of 40-50 degC, high heating temperature, long service life, and durability. 5. APPLICATION OF MULTIPLE SIZES: Can be cut according to your own needs, suitable for a variety of shoe sizes 35-46(35-40/41-46 optional), the foot length applicable range is 230-280mm, and according to the size of the dotted line to cut according to your needs. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Specification: Name: USB Heated Insoles Insole fabric: EVA elastic fiber Temperature 40-50 degrees (depending on the environment) Suitable size: 35-40/41-46, can be cut Heating material: far infrared carbon fiber Voltage: 5V/2A includes: Choice 1: 1 pair x Insoles 1 x USB cable 1 x user manual Choice 2: 1 pair x Insoles 1 x USB cable 1 x user manual 1 x adapter