Stay warm and cozy in the cold winter with the Smart Tech USB Heated Winter Vest for Men. This essential outdoor accessory is compatible with any portable USB power bank. Experience intelligent heating with the built-in heating module and waterproof design, ensuring safety and easy washing. Stay comfortable with the humanized heating parts that target areas prone to cold. Adjust the temperature according to your preference with the three color temperature control levels. The vest is made of high-quality, skin-friendly, and waterproof fabric. Choose from sizes S, M, and L for a perfect fit. Power bank not included.