91% Polyester, 9% Elastane. Fabric: 4 Way Stretch. Design: Logo. Neckline: Crew Neck. Sleeve-Type: Short-Sleeved. Fabric Technology: Breathable, Moisture Wicking, UA Rush. Reflective Detail, Seamless. Fit: Regular. 8 UK: 33.5 in. 10 UK: 36 in. 12 UK: 38 in. 14 UK: 41 in.