HEXON HEAT TECHNOLOGY™ EQUIPPED STAYS WARMER FOR LONGER, FASTEST HEAT UP TIME, GREATEST HEAT COVERAGE All Day Run-Time: (8) hours on low, (4) hours on medium, (2) hours on high (2) Heat Zones: Chest and Back Zippered Battery Pass-Thru Pocket: Position the battery in the front or the back pocket to improve comfort Durable fleece and warm jersey lining for complete comfort in all conditions Three-panel hood design with hidden drawcords to provide safety on the job Full-zip to chin for added warmth and comfort Standard Fit: A balanced fit with a regular cut that provides a clean look without being too tight or too loose. Size up if you prefer more of a relaxed fit.