Waterproofness : GORE-TEX

Kickstart your marathon-distance trail adventures with easy hydration

100% Recycled Polyester with DWR Finish

Rearfoot-focused Active Foot Frame™: For more supportive landings

Exclusive of Decoration and Elastic

Smartwool Men's Classic Thermal Merino Base Layer Crew Black Color Shift Running Waterproofness : GORE-TEXSW016350K42 Meet 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,