The vest is very good in style and warm. The only thing is the battery life. It seems to be much shorter than 4 hours in normal setting (white LED) after one full charge of battery
Heated Vest for Land Surveyors
Keep warm. Improve productivity.
The ewool® Heated Vest is the most powerful and simple to use heated mid-layer in the world. Cold is no longer an obstacle with this most advanced, high-density, full-coverage heating system. Purposefully simplified for worker efficiency, you get instantaneous, all-day heat with maximum maneuverability. The ultimate life-hack in professional heated workwear.