The Vigor Collection is guaranteed to help you layer intuitively and effectively for cold weather adventures. Each Vigor piece is powered by ActiveTemp™, the thermo-regulating technology that adjusts to your body temperature to keep you cool, dry, and comfortable during high-exertion activities. Take on each new adventure with Vigor. Learn more about ActiveTemp™ technology right here. [https://www.outdoorresearch.com/blog/article/get-to-know-thermo-regulating-technology-activetemp]