STAY WARM WITH 3 HEAT SETTINGS. With three targeted heat zones across the neck, chest and back and three heat settings, you’ll enjoy warmth your way—whether you’re working outdoors, hitting the slopes, or braving a freezing commute. UP TO 9 HOURS OF WARMTH. Long-lasting warmth on a single charge with 3 heat settings. Low, medium, or high for each zone. Keep it on low to maximize those hours for longer use. Heat Setting; Low - 104° F, Med - 122° F, High - 140° F. With heat zones in the abdomen, back and neck, you are heating up your core muscles increasing circulation, keeping yourself warm even in the harshest conditions. WARM TEMPERATURE UP TO 140° F. Heat Setting; Low - 104° F, Med - 122° F, High - 140° F. Choose your temperature at the click of a button! FlexCore is named for the flexible, close-to-body warmth it delivers—think of it as your personal climate layer that bends with you instead of fighting back. MACHINE WASHABLE. Easy to clean and maintain both inside and out! The material is a lightweight stretch performance fabric. Just make sure to remove the battery first. It is a 10,000 mAh Battery and USB Charging Cable Included – Rechargeable power (charger block not included). PREMIUM GRADE MATERIALS. Built for performance, comfort, and versatility, FlexCore is the essential heated base layer for winter. Conquer the cold with confidence. The Gobi Heat FlexCore Women’s Heated Base Layer Shirt features dual control technology, giving you the power to heat the front, back, or both zones independently. With three targeted heat zones across the neck, chest and back and three heat settings, you’ll enjoy warmth your way—whether you’re working outdoors, hitting the slopes, or braving a freezing commute. Designed for layering or wearing solo, this slim, flexible shirt delivers up to 9 hours of warmth from the included 10,000 mAh rechargeable battery. Built for performance, comfort, and versatility, FlexCore is the essential heated base layer for winter.