Lightweight in-mold construction fuses the exterior shell and EPS foam for a one-piece design that's lightweight and durable

Fit updated to improve functionality while enhancing aesthetics for a range of body shapes

Deep fit—a roomier

Features: Flex tuning

Smartwool Men's Merino 250 Baselayer 1/4 Zip Size:M Lightweight in-mold construction fuses theDescription We've updated the fit of our Men's Merino 250 Base Layer 1 4 Zip to improve functionality while also enhancing aesthetics. As one of our heaviest base layer tops and best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help minimize chafing as well as help keep you comfortable and temperature regulated as you enjoy high intensity skiing, hiking,