Smarten up your layering system with our SHE Outdoor Web-Enabled 5V Battery-Heated Long-Sleeve Baselayer Shirt for Ladies! It delivers cozy warmth up to 130F, so you'll feel almost invincible against winter's grip, especially when you're sitting in the blind. Powerful Tri-Zone heating system features 3 built-in carbon-fiber heating panels around your core for well-balanced warmth. The included ActionHeat 5V, 6,000mAh Power Bank powers your garment but also can be used to charge your phone, tablet, or any USB-charged device (Note: Heating times will diminish if used to charge other devices). FAR infrared-heating and ActionWave heat-reflective technology circulate heat for hours of comfort. To use, fully charge the power bank using the included charger kit, connect the power bank to the USB plug located in the pocket, and use the touch-button control to turn on and adjust the temperature setting. 92% polyester/8% spandex ActionFlex material ensures a light and trim fit made for movement. LED power indicators on the power bank display remaining battery life. Disconnect batteries when not in use and remove them before washing. This heated baselayer includes a power bank and USB charging kit. Estimated Heating Times: High (Red) 130F for 2+ hours; Medium (White) 110F for 3+ hours; Low (Blue) 90F for 4.5+ hours. Machine wash. Imported. 92% polyester/8% spandex Cozy warmth up to 130F Powerful Tri-Zone heating system with 3 built-in carbon-fiber heating panels Includes ActionHeat 5V, 6,000mAh Power Bank to power garment Also charges your phone, tablet, or any USB charged device FAR infrared-heating and ActionWave heat-reflective technology circulate heat Use the touch-button control to adjust temperature setting Light ActionFlex material for a trim fit made to move LED power indicators display remaining battery life