Official Teenager T-shirt Birthday 13th Gift for Girls Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat Official Teenager T-shirt Birthday 13th Gift for Girls Birthday Gift Tshirt for Girls - 13th Birthday Shirt Lightweight, Classic fit, Double-needle sleeve and bottom hem