Kids HeatTech Scoop Neck Long Sleeve T-Shirt from Uniqlo in Black. 54% Polyester, 39% Rayon, 7% Spandex. Light and warm but not bulky. The newly updated design is perfect for layering. New with tag. Size: 3-4 Color: Black Measurements: Chest is approximately 21-23 inches Height is approximately 41.5-45 inches Scoop Neck Long Sleeve T-Shirt for Kids