Warm clothing helps to improve blood circulation, improve metabolism, and reduce muscle stiffness. USB power supply, convenient charging and safe to use. The perfect gift for an elder, lover or friend. The best Thanksgiving and Christmas gifts.Specification:Material: 91.1% polyester + 8.9% spandex.Color: black (male)Type: maleSize: M / L / XL / 2XL/3XL/4XLTemperature mode:High temperature mode about 55℃Isothermal mode is about 45℃Low temperature mode is about 35℃Packing list:1 * pants1 * shirtNote: This product does not include power banks.Feature:●8 carbon fiber heating elements generate heat in the central area of the vehicle body.●Just press the button to adjust 5 kinds of heating settings (high, medium, low).●The heating underwear is equipped with a USB plug for easy charging. A pocket for easy carrying of the battery. (Excluding mobile power/battery).●Suitable for skiing, running, biking, mountaineering, hiking and other outdoor activities.