Classic Thermal Merino Base Layer 1/4 Zip Size:XL Thickness at heel: 4

Thickness at heel: 4

it’s a difference you – and your muscles and joints – will feel

An aggressive

Bite valve keeps liquids from escaping

Classic Thermal Merino Base Layer 1/4 Zip Size:XL Thickness at heel: 4We'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