92% Polyester, 8% Elastane. Design: Back Print, Logo. Neckline: Crew Neck. Sleeve-Type: Short-Sleeved. Fabric Technology: DryCELL. Sustainability: Made from Recycled Materials. 13 Years: 33.5 in. 7-8 Years: 27.5 in. 9-10 Years: 29.5 in. 11-12 Years: 31.5 in.