100% Polyester. Fabric: Microfleece, Soft Touch. Design: All-Over Print, Horse. Fabric Technology: Breathable. Anti-Pilling. Neckline: Fused Stand Up Collar. Sleeve-Type: Long-Sleeved. Fastening: Half Zip. Please Note: Keep Away From Fire. 2-3 Years: 21.5 in. 3-4 Years: 22.5 in. 5-6 Years: 24 in. 7-8 Years: 26 in. 9-10 Years: 28.5 in, 28.5 in. Ref: UTMW4494