The Merino 150 Anatomica Moss Bloom Boxer wraps a merino wool blend around a corespun core, so it regulates temperature and resists odor through days of travel or trail use that would leave cotton smelling stale. A slim, close-to-body fit keeps it low-bulk under other layers, and flat seams stay smooth against skin through long days of movement. What Our Gearhead(R) Experts Are Saying:"I wore the same pair three days into a backpacking trip and never once thought about packing a spare."