100% Polyester. Fabric: Neoteric. Design: Plain. Neckline: Crew Neck. Sleeve-Type: Set-in, Short-Sleeved. Fabric Technology: Lightweight, Moisture Wicking, Quick Dry. Back Neck Tape, Tearaway Label. Fit: Relaxed Fit. 140gsm. Sustainability: Amfori, BSCI, Oeko-Tex Standard 100 Certified, PETA-Approved Vegan, Sedex, WRAP Certified. Conforms to Safety Standard: GTX Pro Tested. Sun Rating: UPF 30+. 12-13 Years: 34 in. 3-4 Years: 26 in. 5-6 Years: 28 in. 7-8 Years: 30 in. 9-11 Years: 32 in. Ref: UTRW689