The under-jacket is very light but keeps you warm, compresses and is easy to wear. Stimulates blood circulation, relieves muscle tension and discomfort in the shoulders and back p> High-quality fabric, anti-static, light and warm, good thermal performance. It uses high-quality imported TPU heating plate, which can heat up quickly and can be worn in various environments, such as skiing, mountaineering, all outdoor and indoor activities are suitable. The size can be adjusted freely to choose the right size for you. The heated vest is waterproof and windproof and can withstand all weather. Adopting stitching and lightweight design makes you wear more comfortably. Our warm vest pocket has an invisible zipper for a better look. This unisex vest with USB heating adds a touch of style. To extend the life of the heated vest, we advise you to wash it by hand or in a clean bag then in the machine. Our heated vest has a protection module inside.No radiation, low voltage, once overheated, it will shut down until it returns to standard heat. The heat can be freely selected and adjusted according to your own warmth. High safety index, suitable for everyone.