Description: The material of the heating insoles is comfortable and skin-friendly. With the help of the heating insoles, you will feel happy when doing sports outdoor and never worry about the cold winter anymore. Support water wash. Features: [USB Powered]Powered by any portable 5V (low and safe voltage) charger, USB plug compatible with most power banks(not included) in the market. [Useful]It can help to warm the feet, promote blood circulation, and relieve the discomfort of muscle. [Free to Cut]The electric insoles can be cut into your need size, adjustable to your shoe size. [Practical]Made of high-quality heating wire, and the heating surface is evenly distributed, even heat distribution. [Widely Applicable]Perfect for outdoor activities like snowmobile, motorcycling, mountain climbing, camping, hiking, skiing, and business use during the fall and winter months. Specifications: Color: Black Gender: Men & Women Material: EVA, Composite Fiber Style: Modern Heating Mode: 40-50 degrees Celsius Occasion: Outdoor, Office, Travel, etc Item Length: Free to Cut(US5.5-9.5) Package Size: 30*10*3cm / 11.81*3.93*1.18inch Package Weight: 80g / 0.17lb Package List: 1 * Heated Insoles (power banks not included) 1 * USB Cable 1 * User Guide