SmartWool Merino 250 Crew Baselayer. SmartWool's best selling, and warmest base layer, just got a little more refined with an improved fit, chafe-free seam construction and panels that offer more comfort with a pack.
Crew neck with set in sleeves
Back body seam wraps to front for body enhancing fit
Shoulder panels eliminate top shoulder seams
Flatlock seam construction is designed to eliminate chafing