From days on the road to wintery summits to dusty trails, this baselayer is built for extra-long training days or multi-day excursions. A 80/20 synthetic/merino blend fabric combines the natural breathability, soft-touch, anti-odor, and temperature regulating properties of merino wool with the durability of synthetic. The knit jersey fabric is lightweight and stretchy, providing reliable next-to-skin comfort in all training temperature and moisture conditions.