The Duckworth Men's Vapor Wool Brief may look like your typical boxers, but it's actually crafted with merino wool from Montana sheep for superior comfort. Merino wool is extremely breathable and regulates temperature to keep you comfy when you're hiking in the mountains to biking through the city. Merino wool is also luxuriously soft for silky-smooth comfort, and it naturally resists odor, wicks moisture, and dries quickly for extra freshness.