Mens Underwear

When the day starts early and ends late, what's closest to your skin matters most. Men's Underwear from Smartwool is merino-first underwear built for hiking, travel, and everyday wear — soft on skin, breathable on the move, easy to wear again tomorrow. Explore our thermal underwear for cold-weather layering, or browse men's thermal trousers to complete your base layer kit. Looking to kit out the whole crew? Discover women's thermal underwear too.

Men’s Merino Wool Underwear FAQs

Q: How to wash Merino wool underwear?

A: Machine wash on a gentle cycle with mild detergent and lay flat to dry. Avoid fabric softeners and bleach to maintain the quality and longevity of your underwear. See more instructions on how to wash and care for Merino wool here.

Q: How fast does Merino wool underwear dry?

A: Merino wool underwear dries relatively quickly due to its natural moisture management properties, typically drying faster than cotton. For best results, lay it flat to dry in a well-ventilated area.

Q: What are the benefits of Merino wool underwear for men?

A: Merino wool underwear offers excellent moisture management, odor resistance, and breathability, ensuring you stay comfortable and fresh all day long.