Whether we are climbing or cross-country skiing, having a lightweight performance vest that adds an insulating layer is a must-have when we are moving in the mountains. The Windbreaker Vest is made from ORTOVOX's Tec-Stretch and Merino Protect fabric, which uses a blend of Merino wool and nylon to give us a windproof, water-resistant, and stretchy vest that helps manage our body temperature. A PFC-free DWR coating helps to shed moisture, and the zippered chest pocket doubles as a storage pouch so we can easily pack the vest into our bag.