Finding the right layers for high-output activities can be tough. You overheat on the skin track only to freeze on the summit. The belay is warm, but your lead is a hot mess. We get it. From pre-dawn starts to headlamp descents, our midweight active insulation pieces are the ideal solution for shoulder season warmth and stop-and-go pursuits in cool to cold conditions.  

By utilizing cutting-edge technology like PrimaLoft Gold Insulation with Cross Core (used in NASA-developed space suits), and best-in-class materials (Japanese liquid crystal polymer ripstop), these layers provide warmth when you need it, plenty of stretch, and unparalleled breathability when it’s go time. In addition, we’ve maintained a warmth-to-weight ratio that’s optimized for dynamic adventures in the mountains.