1. Polyurethane and Polyester: The heated underwear is made of polyurethane and polyester, folded fabric and tightly stitched. Super comfortable and soft, giving you a fashionable and classic experience. It can not only be used as warm pants, but also as fashionable pants.2. Keep Warm Function: These warm pants protect your legs from cold weather. Helps to enhance metabolism, reduce muscle stiffness, and keep the body warm.3. Fast Heating: 15 seconds fast heating, 3 heating zones are designed to increase the heating range. 3 adjustable temperature, 5V safety voltage. Improved closure type, double protection by pulling rope and elastic belt.4. Matching and Applicable: This electronic black pants can be paired with fashionable jackets, sweaters, sweatshirts or thermal vests which is suitable for outdoor activities, hunting, skiing, fishing, motorcycle, bicycle, camping, mountaineering, outdoor participation, daily office, etc.5. USB: These heating pants do not come with a mobile power supply or battery, but also have a USB plug, which is no longer limited to a dedicated battery, just use the 5V/2A mobile power supply commonly used in the market.6. Good Gift: Whether it's Christmas, birthday, Valentine's Day, or Mother's Day, heating trousers are the perfect gift for your girlfriend, best friend, woman, or colleague.Specification:Item Type: Heated UnderwearMaterial: Polyester fiber, polyurethane, carbon fiber, cottonPower Supply Mode: USB, delivery without batterySize: S: Length: 93.5cm/36.8in, hip: 80cm/31.5in, waist: 57cm/22.4in, foot: 11.2cm/4.4inM: Length: 94cm/37.0in, hip: 84cm/33.1in, waist: 60cm/23.6in, foot: 12cm/4.7inL: Length: 95.5cm/37.6in, hip: 88cm/34.6in, waist: 63cm/24.8in, foot: 12.8cm/5.0inXL: Length: 97cm/38.2in, hip: 92cm/36.2in, waist: 64cm/25.2in, foot: 13.6cm/5.4in2XL: Length: 98cm/38.6in, hip: 96cm/37.8in, waist: 67cm/26.4in, foot: 14.2cm/5.6in3XL: Length: 99cm/39.0in, hip: