Super WarmWomen Men The thermal underwear is lined with high quality polyester and windproof, ensure excellent warm performance and windproof function in cold weather. Breathability and Quick DryingBreathable and moisture-wicking fabric is ideal for drying and drying sweat quickly. The thermal base layer are perfect against odors and unpleasant odors caused by sweat and dirt. Machine washable and dry washable. 3 Temperature Control LevelsHeated thermal underwear with USB charging has 3 temperature control levels: strong (red 55C), medium (white 45C) and weak (blue 35C). When the temperature reaches 60C, the heating will stop automatically. Adjust the temperature of the underwear according to the different weather, avoiding hot and cold.Ski underwear lined with fleece as the second layer is also windproof and suitable for autumn and winter sports. Multi-occasionsThis thermal underwear is ideal for cold weather and cool autumn. Functional underwear is suitable for all kinds of activities, such as jogging, squats, weight training, cycling, yoga, etc. Also can wear as ski underwear, daily thermal underwear, pajamas and singlet and pants.