100% Polyester. Fabric: Stretch, Textured. Design: Logo, Textured. Neckline: Crew Neck. Sleeve-Type: Short-Sleeved. Fabric Technology: Breathable, Moisture Wicking, Odour Control, Quick Dry, Soft, UA Tech. 8 UK: 33.5 in. 10 UK: 36 in. 12 UK: 38 in. 14 UK: 41 in. 16 UK: 44 in.