Material: cotton, size: 24.5 * 12cm, one size, elastic, USB powered on, with switch This hand warmer gloves uses USB data cable and heating pad, low power consumption, safe and convenient to use, warm your hands in one minute. High-end knitted fabric, super soft and super elastic, exquisite knitting and hemming, durable, protect you from the influence of cold weather, while providing full flexibility for your hands and fingers. It can be used all year round, this glove can also be washed, just take out the mat before washing. The knitting heated gloves design is very humanized and easy to use,the soft knit fabric is elastic and comfortable to wear without tightness, allowing you to move your fingers dexterously and wrapping your fingertips to keep them warm at all times. The special material on the top of your thumb and index finger keeps your fingertips in contact with the top of the gloves, allowing you to easily operate your cell phone, computer, etc. while wearing the gloves. The heating temperature of USB power gloves is about 37-45C, which is the most comfortable temperature range for the human body. Therefore, using our gloves will not feel dry and overheated because of the high temperature. With this USB warm glove, even if you need to work/study in front of the computer, you can say goodbye to the cold winter.(Note: USB heated gloves are not a cordless design.) Knitting hands warmer are the best gift choice for you and your family and friends in cold winter. It is suitable for gaming, typing, operating a mouse and many other situations, such as work, entertainment, skiing, cycling, hiking, outdoor adventures, etc.