Men's Smartwool Thermal Merino Base Layer Crew - SW016349-K61 Size:L so we've added a reflectivity

so we've added a reflectivity in key areas

Best for preserving the future of our planet

- 6-pin spike plate delivers an aggressive and forgiving ride

Sweat-wicking technology and a ventilated waistband help keep you dry and cool on the go

Modular system works with other On Apparel

Men's Smartwool Thermal Merino Base Layer Crew - SW016349-K61 Size:L so we've added a reflectivityMeet the better than ever Men's Classic Thermal Merino Base Layer Crew. We've updated this 100% Merino wool fan favorite with new colors and a new fit to improve functionality while enhancing aesthetics. Shoulder panels eliminate top shoulder seams and a flatlock seam construction helps prevent chafing. Add one of our best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing,