Everyday Warmth Upgrade Without Bulk: More consistent core warmth than traditional winter vests, designed to keep you warm in cold conditions without heavy or bulky layering. 4-Zone Smart Core Heating System: Strategically placed heating zones at the collar, mid-back, and both pockets create balanced warmth across your core, targeting the areas most affected by cold for steady comfort. Reliable Power You Can Count On: Powered by a 7.38V 4800mAh (35.4Wh) rechargeable battery, delivering up to 10 hours of warmth on low setting with 3 adjustable heat levels for all-day flexible comfort. FELLEX Insulation for Lightweight Winter Warmth: Premium FELLEX insulation provides reliable heat retention in cold weather, remaining lightweight, soft, and comfortable for all-day winter layering. Designed for Everyday Winter Life: Ideal for commuting, walking, errands, and daily winter routines, delivering dependable warmth for real-life cold-weather situations.