Mens Classic Thermal Merino Base Layer 1/4 Zip Harbor Taped shoulder seams for comfort

Taped shoulder seams for comfort and fit retention

a dim mode

The Astro's dimming and strobe modes let you customize the lighting to your needs

the flexible Stow 1L has an internal baffle that makes it easier to hold and pocket

The spill-proof nozzle allows for easy drinking

Mens Classic Thermal Merino Base Layer 1/4 Zip Harbor Taped shoulder seams for comfortWe'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, running, and