"I'VE NEVER BEEN SO COMFY AND WARM IN MY ENTIRE LIFE. I LIVE IN THIS HOODIE." — JEN, IL Carbon-Z3 Heating System Runtime 12 hours - low 7 hour - med 3.5 hour - high Heating Panels right chest left chest back Control Type 10 in-app settings 3 on-board settings Integrated with HeatSync™ Control your heated apparel remotely featuring Exclusive Bluetooth App On-Board Manual Button Controls notes from our lab Transform our favorite quality hoodie into the ultimate loungewear that is wearable indoors and out. Ultralight Battery 5000 mAh capacity now 40% smaller and lighter engineered ultracompact lithium-ion cells UL Certified / TSA Approved