Smartwool Merino wool thermal undershirt

Discover the new classic Merino thermal base layer T-shirt for men, now even better. We've updated this 100% Merino wool favourite with new colours and a new fit to enhance functionality while boosting aesthetics. The shoulder panels eliminate upper seams, and flat seam construction helps prevent irritation. Add one of our best cold weather base layer t-shirts to your winter wardrobe and feel the difference the next time you go skiing, hiking, climbing, or cycling.