Smartwool Classic Thermal Merino Base Layer Crew – Men's Color:Mineral Blue Heather Black/Green

Black/Green

the R1 TechFace is our pick for trail runners and alpinists who need warmth without the bulk

a shoulder strap

Water-ready construction dries quickly after full submersion — built for creek crossings

NextVent back panel and padded shoulder straps keep airflow moving and reduce fatigue on long climbs — sternum strap with whistle buckle adds security on technical terrain

Smartwool Classic Thermal Merino Base Layer Crew – Men's Color:Mineral Blue Heather Black/GreenWhen the temperature drops and the miles get serious, this midweight merino crew is our first recommendation for cold weather trail runners and backcountry athletes. 100% merino wool in an interlock knit naturally regulates temperature, wicks sweat, and kills odor without chemical treatments. Offset flatlock seams and a seam free shoulder panel make it comfortable under a pack all day. 100% responsibly sourced merino wool regulates body temperature