Smartwool Active Boxer Brief 2-Pack – Men's size-10 Adjustable hood adds coverage when

Adjustable hood adds coverage when wind picks up without getting in your way when you don't need it

ThermoBall Eco synthetic insulation mimics down's warmth using small fiber clusters that retain heat even when compressed

Heavyweight sweater-knit fabric with a classic texture that looks as good off the trail as on it

and lower back after hard efforts

Smartwool Active Boxer Brief 2-Pack – Men's size-10 Adjustable hood adds coverage whenFor runners, hikers, and active guys who wear the same base layer from trail to travel, the Active Boxer Brief 2 Pack is our pick for daily performance underwear. Merino wool blend fabric regulates temperature and fights odor naturally, while flatlock seams eliminate the chafing that synthetic underwear causes on long days out. Merino wool blend wicks moisture and resists odor without chemical treatments stays fresh through back to back days of hard