Introducing the Therm Base Blue by Smartwool, a textured crewneck perfect for men seeking comfort in Pewter Blue. This long sleeve design is composed of 100% Merino wool with an interlock knit, enhancing breathability, thermoregulation, and odor resistance. The flatlock seam construction and wrap-around side seams ensure a body-enhancing fit while minimizing chafing. Closure - Pull on. Care - Machine wash.