100% Polyester. Fabric Technology: Aeroready, Breathable, Lightweight. Neckline: Crew Neck. Mesh Inserts. Fit: Regular. Sleeve-Type: Short-Sleeved. Design: Crest, Striped, Text. Mesh Inserts. 100% Officially Licensed. Sizing Template: Chest: (3-4y) 22in | (4-5y) 23in | (5-6y) 24in | (6-7y) 24.5in | (7-8y) 25in | (8-9y) 26.5in | (9-10y) 28in | (10-11y) 29.5in | (11-12y) 30.5in | (12-13y) 32.5in | (13-14y) 34in | (14-15y) 35in. Ref: UTGT58422