100 percent Merino wool. Fabric woven in the USA. Dry clean only. Imported of USA fabric. 

Pendleton Woolen Mills' product description-
Our beloved merino shirt, now in a sportier style. Crafted from AirLoom® merino wool in a fine twill weave for breathable, year-round comfort, it features two pleated button-through pockets with slightly peaked flaps and crossed back yoke,. Shirttail hem is slightly longer in back.