Smartwool Merino Wool Baselayer Crew Long Sleeve Stretch Shirt sz L 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 Excellent pre own condition Measurements on pictures Tags outdoor hiking walking trails camping exercise bike trail comfy lightweight fall winter ski snow warm cozy stretchy travel