Feature: 1. Fashion & Convenience: Fashionable and casual stand-up collar design, convenient and practical pocket design. 2. Humanized Design: The heating block is designed for the neck and back parts that are easy to get cold, and the large capacity zipper pocket prevents the loss of items. 3. Washable: Because the heating wire inside is carbon fiber wire, unlike metal copper wire, which can conduct electricity, the heating vest can be cleaned freely in the washing machine, so you don't have to worry about it. 4. Wide Application: The heated vest can quickly and safe generate heat. Even in extremely cold weather, you can quickly enjoy the comfort brought by warmth. So this heated vest for you to enjoy outdoor activities like fishing, camping, hiking, motorcycling, skiing, climbing or some outdoor works. 5. Satisfaction Guarantee: We strive to provide each customer with the highest standard of customer service to ensure you have a pleasant shopping experience. If you have any issues, inquiries or need assistance, please feel free to contact us directly. Specification: Color: black Material: polyester Size: M, L, XL, XXL, 3XL, 4XL Warm Tips: Washable, the power interface is insulated and waterproof. 5V, without battery. Long endurance (take 10000mA power bank as an example), 10000mA = 6 hours.