100% Cotton. Design: Back Print, Mountain, Text. Neckline: Round Neck. Sleeve-Type: Short-Sleeved. Fabric Technology: Breathable, Fade Resistant, Lightweight, Peel Resistant. Fit: Relaxed Fit. Conforms to Safety Standard: PPE Regulation (EU) 2016/425. Sun Rating: UPF 50+. 8 UK: 36 in. 10 UK: 38 in. 12 UK: 37 in. 14 UK: 39 in. 20 UK: 47 in. 18 UK: 46 in. 16 UK: 41 in. Ref: UTMW4326