ARRIS just release a new version heated vest according to customer's requirements. The material of this heated vest is soft fleece, it comes with 8 heating panels, and the 3 buttons on front can control them in 3 zones seperately: one control the upper two panels in front, one control the lower two panels in front , and the rest button control the 3 panels on the back and the one on the neck. You can choose to power any one of the zones or all of them at the same time.
Since there are more heating panels, so the battery is the high capacity one---7.4V 7200mah high capacity battery. It can power up to 10 hours. (The heating temperature and the heating panels you choose will influence it)
The same as other ARRIS heated vest, the temperature is adjustable from 40℃ to 80℃ (104℉ to 176℉).
ARRIS always consider the safety at the first important place. Therefore,The heating material is made from carbon fiber, which is safer, softer and more health than original heating method. And there is built-in thermal protection module. Once it is overheat, it would stop until the heat return to the standard temperature.
For more details about the vest, you can check here https://www.arrislife.com/collections/heated-clothing/products/arris-fleece-heated-vest-for-men-7-4v-electric-warm-vest-8-heating-panels-size-adjustable-for-hiking-cycling.