Except for adding the convenience of washable wool, Woolrich has made the Alaskan Wool Shirt for Boys just the same since they built the first ones for Alaskan gold prospectors in the 19th century. The heavy-duty wool blend (80% wool/20% nylon) will stand up to years of hard use. Snap-front closure and flap pockets. Safe guardive double layer back yoke sheds H2O. Poly/cotton inner collar band and inner back yoke prevent chafing. Shoulder pleats allow ease of movement.