Want to stay warm in the field? You know it starts with the right base layer: our Women's Pecora Lightweight Merino Crew. We make it using an exclusive, DuraSpun Merino fabric — Merino fibers wrapped around a single strand of Cordura® thread for incredible strength. In other words, the Women's Pecora Lightweight Merino Crew is more than soft, comfortable, moisture-wicking and naturally odor-resistant. It's unbelievably tough, just like you.