Feature: 1. 3 LEVEL HEATING: USB heated vest with built in carbon fiber heating component and 3 level heating level (25℃‑45℃). You can wear it for skating, skiing, hunting, shoveling, fishing, hiking and enjoying outdoor activities. 2. MAIN EFFICACY: Heated vest generates consistent heat for 13 core body parts, including the neck, back, abdomen and lower back, helping to keep the body warm, improve blood circulation and relieve muscle pain and tension. 3. USB POWERED: This heating vest is powered by a portable charger that supports 2A or 2.4A USB output. Plug in the 10000mAh battery pack (not included) to keep warm for up to 7 hours at low levels, 5 hours at medium levels and 3 hours at high levels. 4. LIGHTWEIGHT AND COMFORTABLE: The electric heating vest features a lightweight design and fine lining with a zipper on the front, so you can layer it over a variety of top to add an exquisite and stylish look for fall and winter. 5. CARE REQUIREMENTS: To maintain quality and extend the life of your heated vest jacket, please hand wash or machine wash in a laundry bag. Place in a well ventilated area to dry before another time use. Do not bleach, iron or dry clean. Specification: Item Type: Heated Vest Material: Polyester, Carbon Fiber, Cotton Color: Black Power Supply: USB (Shipped Without Battery). Package List: 1 x Heated Vest (Battery Not Included) Note: Manual measurement, please allow 0.4‑1.2in error.