Smartwool has updated the fit of their Merino 250 Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of their 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, running, and more. PRODUCT FEATURES:*25 cm center front zipper semi-locking slider*Knit in Vietnam: 100% Merino Wool. *Exclusive Of Decoration*Garment Weight: 298 g = 10.51 oz *Slim Fit *100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance *Fit updated to improve functionality while enhancing aesthetics *Shoulder panels eliminate top shoulder seams *Flatlock seam construction designed to minimize chafing Smartwool Men's Classic Thermal Merino Base Layer 1/4 ZipSW016355