Whether you're suiting up for a blustery pow day or getting ready to go out for a summer hike, the Norrona Men's Wool Boxer will deliver the breathability and temperature-regulating performance you need for both venues. They're constructed from a blend of fine merino wool (17. 5 micron) and durable nylon to keep your lower half dry and comfortable when you're sweating it out on the trail or trying to keep warm between powder laps.