100% Organic Cotton. Trim: Elastane, Organic Cotton. Design: Scenery, Text. Neckline: Crew Neck. Sleeve-Type: Short-Sleeved. Fabric Technology: Breathable, Lightweight. UV Protection. Conforms to Safety Standard: CE ED 2016/425 . Sun Rating: UPF 50+. 8 UK: 34 in. 10 UK: 35 in. 12 UK: 37 in. 14 UK: 39 in. 20 UK: 47 in. 18 UK: 44 in. 16 UK: 41 in. Ref: UTMW4330