This Merino wool top is built for long days moving over rugged terrain. We’ve long believed that Merino is the ideal material for running and wanted to build a robust long sleeve for the trail, when the temperature at the base is rarely the same as it is at the top. Made from a blend of Merino and tencel, this heavyweight, warmer cousin to our Harrier long sleeve is ideal for off road adventures where you need a top to last a full day of running, and the next day too.