Merino wool has evolved for eons to be nature’s ultimate next-to-skin insulator. This superlatively soft fiber naturally regulates temperature, fights stink and wicks moisture to keep you feeling dry, warm and chafe-free all day. We’ve amped up its performance even more by adding quick-dry polyester and flexible spandex for more freedom on the move. It’s the ideal fabric for this high-functioning 1/4 zip. Designed for bulk-free layering, it features Reach Gussets® for unrestrained arm movement. Make it your go-to on winter’s baaaa-dest days.