100% Polyester. Fabric: Microfleece. Design: Checkered, Embroidered, Logo, Pit Crew, Printed, Tools. Neckline: Crew Neck. Cuff: Fitted. Hem: Fitted. Sleeve-Type: Long-Sleeved. Fabric Technology: Soft. All In One. Fastening: Full Zip. 100% Officially Licensed. 7-8 Years: 26 in. 5-6 Years: 24 in. 11-12 Years: 31 in. 9-10 Years: 29 in. 3-4 Years: 22.5 in. Ref: UTNS8603