65% Cotton, 35% Polyester Screen printed graphics, Player name and number on back Wicks away moisture, Fabric helps manage your body's natural heat to keep you warm Boys Youth Sizing: Small (8), Medium (10-12), Large (14-16), X-Large (18-20) Officially licensed NFL product Represent your favorite team in this NFL Boys Youth Khalil Mack Chicago Bears Player Pride T-Shirt. Great way to show your team spirit. Boys Youth Sizing: Small (8), Medium (10-12), Large (14-16), X-Large (18-20)