Heated JacketThe heated vest delivers style, comfort, and warmth to make those cold workdays more bearable. Promote metabolism, promote blood circulation, and relieve muscle pain, warm jacket keeps the whole body warm in cold winter. 3 HEATING LEVELS Heat quickly in seconds, carbon fiber heating elements generate heat across core body areas (left & right abdomen, collar & mid back); Adjust 3 heating settings (High, medium, low) with just a single press of the