50% Cotton, 50% Polyester. Characters: Bam, Batgirl, Batman, Bibi, Red Bird, Robin. Design: Printed. Fabric Technology: Heavyweight. Hem: Ribbed. Neckline: Crew Neck. Sleeve-Type: Long-Sleeved. Cuff: Ribbed. Fastening: Pull Over. 100% Officially Licensed. 12-13 Years: 40 in. 3-4 Years: 32 in. 7-8 Years: 36 in. 5-6 Years: 34 in. 9-11 Years: 38 in. Ref: UTBI55797