NIKE Sphere Neck Warmer,OSFM(Anthracite/Volt) :81% polyester,19% polyurethane The contoured design allows for an exact fit with maximum skin coverage NIKE Sphere technology wicks away moisture and delivers lightweight insulated warmth without excess bulk Flat seamed construction reduce skin irritation. features NIKE's Swoosh logo embroidered on the side for brand recognition Machine washable for easy care.