Synergy Pro-Plus 12V Heated Vest. Features: 100% Polyester wind and water-resistant soft-shell fabric 100% Nylon fixed liner Lycra side stretch panels provide added comfort Total of 4 flexible carbon fiber heating elements located on the chest (2), back (1), and collar (1) Heating elements connected using thermoplastic elastomer (TPE) wire for added safety and efficiency Built-in waterproof 3-setting LED smart soft touch controller on left chest Integrated microprocessor and thermal cut-off protect against power surge and overheating of elements 12v DC power / 37.2w power draw / 3.1a current Heat settings: high (126°f/52°c), medium (113°f/45°c), low (100°f/38°c) Integrated and concealed battery harness connector Includes battery harness and safety fuse, requiring no additional accessories for use Hand washable Sizes: Men's: XS - 3XL Women's: S - 4XL