Are you tired of freezing in the cold winter weather? Say goodbye to shivers and chills with our 9Areas Self Heating Vest Jacket! This innovative jacket features a built-in electric USB heater that provides instant warmth at the touch of a button. No more bulky layers or uncomfortable heating pads - just slip on this stylish vest and stay cozy all day long. Please note that this product does not include power banks, so you will need to use a 5V 2A 20000Ah or more power bank to operate the heating function. Simply press and hold the power button for three seconds to activate the heating element, and you're ready to go. The jacket is designed to be lightweight and comfortable, making it perfect for outdoor activities like hiking, camping, or simply running errands in the cold. When choosing your size, keep in mind that our jackets are Asian sizes, which tend to run 2-3 sizes smaller than European sizes. For reference, our model is 180cm tall and weighs 85kg, and wears a size 4XL. To ensure the perfect fit, please consult our size chart and consider your height and weight when selecting your size. Here are some sample reviews from our satisfied customers: - "I love my new self-heating vest! It's so convenient to have instant warmth whenever I need it. The sizing was accurate, and the quality is top-notch." - "This jacket is a game-changer for me. I no longer dread going outside in the cold - I can stay warm and comfortable all day long. Highly recommend!" - "I was skeptical at first, but this vest exceeded my expectations. The heating element works like a charm, and the vest is stylish and well-made." Don't let the cold weather get you down - invest in a 9Areas Self Heating Vest Jacket today and experience the ultimate in winter warmth and comfort. Stay cozy, stay stylish, and stay warm with our innovative heated vest.