100% Polyester. Design: Action Pose, Repeat Print. Characters: Captain America, Hulk, Spider-Man. Neckline: Crew Neck. Cuff: Fitted. Hem: Fitted. Sleeve-Type: Long-Sleeved. Fabric Technology: Breathable, Soft. Fastening: Pull Over, Pull-On. Contents: 3 Bottoms, 3 Top. 100% Officially Licensed. 7-8 Years: 26 in. 5-6 Years: 24 in. 4-5 Years: 23 in. 8-9 Years: 27.5 in. 6-7 Years: 25 in. 3-4 Years: 22.5 in. 9-10 Years: 28.5 in. Ref: UTNS8831