The Mesa Falls Wool Shirt is a lightweight performance Merino wool and nylon jersey blend combining thermoregulation, natural odor resistance and warming properties with the strength of nylon. Engineered stretch provides unrestricted movement with offset shoulder and side seams to minimize bulk and enhance comfort for extended use. Lightweight performance Merino wool and nylon jersey blended for thermoregulation, natural odor resistance and breathable warmth 18.0 micron Merino wool Engineered stretch for increased range of movement Offset shoulder and side seams for reduced bulk, improved comfort and easy layering FIT: Regular Fit FABRICS: 78% jersey Merino wool, 22% nylon | 4.3 oz/sq. yd; 145 GSM