100% Polyester. Design: Logo. Neckline: Crew Neck. Sleeve-Type: Short-Sleeved. Fabric Technology: Lightweight, Moisture Wicking, Odour Control, Quick Dry, UA Tech. Fit: Regular. Occasion: Gym. Sustainability: Made from Recycled Materials. 8 UK: 33 in. 10 UK: 35.5 in. 12 UK: 38 in. 14 UK: 40.5 in. 16 UK: 43 in.