Features: The thin lightweight base layer 12V and 16V batteries getting up to 60°C 4 heating elements on the chest and back 4 battery pockets Acts as a hub for liners and insoles 3 heating levels Includes: Heated vest Cables to connect heated liners Click HERE for the full run time chart Hourly Run Time: Hourly runtime of compact, standard, and high-temperature batteries. SIZING: Regular size to fit for chest size from 30" - 44" (for x-small body to Med/Large body type) Please be aware that if you have chest size from 40 - 44", you will overlap between two sizes of vests (you will be able to fit both sizes). If you are 5' 5" under and between 40 - 44" chest size, we recommend that you take the regular size. Specifications: Heating Element: Woven Carbon Fiber Material: 95% Polyester 5% Spandex Click HERE for the full specification sheet **Note: Heated Vest for Single and Double batteries comes with a regular charger and Quad batteries come with a fast charger. *Note that batteries will last 500 charge/discharge cycles from full to empty. MOTIONHEAT VEST IS PERFECT FOR... RECREATION Fall or winter cycling Skiing and snowboarding Snowshoeing, Hunting, and Ice fishing Hockey and curling Motorcycle and ATV WORKPLACE Roofing contractors Electricians, mechanics, and plumbers Police and military Postal and delivery services Oil field workers