The ActionHeat® 5V Battery Heated Half-Zip Pullover Long-Sleeve Shirt for Men, revolutionary in the world of heated clothing, has a classic style with hidden heating panels to keep you warm and comfortable when the Mercury drops. This ActionHeat heated shirt is ideal for outdoor work, training, or sports events, and has 3 built-in heating panels that are strategically placed on the chest and upper back to warm your core. FAR infrared heating and ActionWave reflective technology deliver hours of heat and comfort. The system utilizes 5V rechargeable batteries and comes with a powerful 6000mAh power bank that can also be used to charge your phone, tablet, or any USB device. The ActionHeat 5V Battery Heated Half-Zip Pullover Long-Sleeve Shirt for Men includes the shirt, power bank, and USB charging kit. 91% polyester/9% spandex. Ultra-fine carbon fiber heating panels. Estimated Heating: High (Red): 150°F for 2+ hours; Medium (Blue): 130°F for 3+ hours; Low (Green): 110°F for 4.5+ hours. Charging time: 4–6 hours. Machine wash. Imported. Manufacturer style #: AH-ZTOP-5V.