1. Safety & Intelligent: This heated vest is designed with advanced carbon fiber and high-quality heating elements for quick warmth. It automatically halts operations if necessary until the heat stabilizes, aiding in blood circulation and alleviating muscle pain. 2. 9 Heating Zones & 3 Temperature Control: The vest features carbon fiber heating elements with three heating levels to provide consistent warmth to nine essential body areas, including the neck, back, abdomen, and waist, helping to retain body heat and enhance blood flow. 3. Premium Skin-Friendly Fabric & Lightweight: Crafted from lightweight carbon fiber, this heating vest is windproof, waterproof, and suitable for machine or hand washing. It is comfortable, smooth to the touch, and offers warmth throughout the winter without the bulkiness of a heavy coat. 4. USB Powered: The USB plug is compatible with most power banks available on the market with a 5V output, ensuring quick and efficient warmth without radiation. 5. Elastic Design & Unisex Style: The heating jacket features an elastic band design for a better fit and enhanced comfort. The dual pocket design provides convenient storage for your phone, cards, keys, and more, making it ideal for various winter sports or outdoor activities such as hiking, skiing, cycling, and fishing. Specification Material: Polyester Color: Black, Red, Blue Size: S, M, L, XL, 2XL, 3XL, 4XL Weight: 351 g, 366 g, 371 g, 395 g, 401 g, 432 g, 443 g Voltage: 5 V Working Time: 8 hours Package Include: 1 Heated Vest