100% Polyester. Fabric: Stretch. Design: Plain. Neckline: Crew Neck. Fastening: Pull Over. Sleeve-Type: Short-Sleeved. Hem: Twin Needle Stitch. Fabric Technology: Lightweight, Moisture Wicking. Tag Free, Twin Needle Sleeves, Ventilated. Fit: Fitted. 135gsm. Conforms to Safety Standard: Amfori, BSCI. Colour Retention. Sustainability: OEKOTEX. Sun Rating: UPF 40+. XS: 32 in. S: 34 in. M: 36 in. L: 38 in. XL: 40 in. Ref: UTRW5573