Features:COMFORTABLE TO WEAR: Our thermal underwear is lightweight and breathable, making it perfect for wearing as a piece of pajamas or loungewear.Fast Heating: The fast heating function can help you resist the cold weather and get a warm and comfortable feeling in a short time.USB interface: The electric heating underwear adopts a USB interface, which can be plugged into any USB port, which is very convenient.Mobile power powered (not included), long-lasting battery life, fast heating, warm immediately after use.STYLISH AND VERSATILE: Perfect to wear under sweaters, coats, dresses, , hoodies, jackets and more.Wide application: These thermal underwear sets are suitable for hiking, cycling, fishing, mountaineering, motorcycling, running, snowboarding, skiing, camping and more.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurement3.Asian size is smaller than eu/us/uksize,please compare the detail sizes before purchasing. Description:Material: CottonSize: XL/5XL