100% Polyester. Fabric: Fluffy. Design: Plain. Fabric Technology: Breathable, Lightweight. Neckline: High-Neck. Sleeve-Type: Long-Sleeved. Fastening: Half Zip, Pull Over. 2-3 Years: 21.5 in. 9-10 Years: 28 in. 5-6 Years: 24 in. 13 Years: 33 in. 7-8 Years: 26 in. 3-4 Years: 22.5 in. 11-12 Years: 30.5 in. Ref: UTMW498