SMARTWOOL CLASSIC THERMAL MERINO BASE LAYER 1/4 ZIP

We've updated the fit of this Merino 250 half-zip base layer to improve functionality and aesthetics. One of our thickest base layers yet and among our best for cold weather, this garment features 100% ethically sourced merino wool, shoulder panels and flatlock seams that reduce chafing for ensure your comfort and regulate your temperature when practicing high-intensity skiing, hiking, running or other sports.