Our designers combined two opposite traits, toughness and tenderness, into one fabric, Comfort Wool's plaited jersey construction places finely spun wool (35%) on the face, where its natural wind-and water-repellent properties are put to work, and soft polyester fleece (56%, and of a contrasting color) inside, where it cleverly wicks moisture away from the skin; 9% nylon adds strength and durability, The crew has blanket-stitch detailing, Made in USA.