Smartwool’s Classic Thermal Merino Base Layer Colorblock Crew features 100% responsibly sourced Merino wool made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance. With shoulder panels and a flatlock seam construction, this base layer brings consistent comfort, as well as reliable warmth and durability, to winter hiking, running, and skiing.
- Slim fit is intended to follow the contours of the body
- 100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance
- Offset shoulder and side seams designed to increase comfort and minimize chafing
- Side seams wrap to front for body-enhancing fit
- Flatlock seam construction designed to minimize chafing


















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