EUC size M length 24" pit to pit. 17.5" The addition of shoulder panels and its flatlock seam construction helps prevent chafing and increases your comfort level. Add one of our best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking,climbing, or biking. Interlock knit for enhanced comfort, preathability, thermoregulation, and odor resistance Slim Fit 100% Merino wool fabric Merino 250