The sweaty work of breaking Path on a powder day sets you up for a big chill once you stop. The Boys's Capilene 2 Lightweight Zip-Neck, Patagonia's fastest-drying performance baselayer, keeps you dry during endurance activities and insulates when skies turn dark. Its open knit invites airflow and provides excellent wicking and exceptional breathability for warm-weather endurance pursuits. Details include a deep zipper to vent the full-coverage neck, raglan sleeves that won't chafe under pack straps, and side seams that roll forward for smooth layering. Made with 4-oz 100% polyester (54% recycled) with Gladiodor odor control for the garment. Recyclable through the Common Threads Recycling Program.