Dual Control Heating – Front, back, or both zones heated separately with 4 heat zones. Comfort that delivers warmth in knees, thighs and lower back! Enjoy Warmth at the Push of a Button - Up to 8 Hours of Heat! Reliable all-day comfort with 3 heat settings. Choose low, medium, or high for each zone. Sleek Black Design and Machine Washable - Easy and convenient once the battery is removed! 10,000 mAh Battery and USB Charging Cable Included – Rechargeable power. Flexible Base Layer Design – Slim, lightweight fit. Stay warm from the ground up. The Gobi Heat FlexCore Men’s Heated Base Layer Pants deliver customized heat with dual control technology, allowing you to power the front, back, or both zones independently. With four targeted heat zones on the knees, thighs and lower back, you can choose the warmth you need—exactly where you need it. Powered by the included 10,000 mAh rechargeable battery, FlexCore provides up to 8 hours of consistent heat in a slim, flexible design made for layering under snow gear, workwear, or casual outerwear.