Smartwool Classic All-Season Merino Base Layer Bottom – Men's Color:Black Size up one for best

Size up one for best fit

Quilted synthetic insulation locks in core heat while the exterior shrugs off light wind and mist

leather-like finish

Stretch-booty construction with gusseted tongue wraps the foot securely and keeps debris out — trail shoe fit in a lifestyle package

while the 4 Degree Elite Fit System locks the sock in place so it never bunches or slips inside your boot

Smartwool Classic All-Season Merino Base Layer Bottom – Men's Color:Black Size up one for bestWhen your day swings from a cold pre dawn start to sweaty midday miles, this base layer handles both ends without complaint. Merino wool naturally regulates temperature and resists odor, so you stay fresh across back to back days in the field or on the trail. A slim cut and flatlock seams keep it invisible under any layer you stack on top. Merino wool construction regulates body temperature naturally across changing conditions no synthetic clammy feel