80% Merino Wool, 20% Polyester. Fabric: Performance. Design: Plain. Fastening: Half Zip. Neckline: High-Neck. Sleeve-Type: Long-Sleeved. Fabric Technology: Anti-Bacterial, Breathable, Lightweight, Moisture Wicking. XXS, XS: 33 in. S: 37 in. M: 40 in. L: 43 in. XL: 46 in. XXL: 49 in. 3XL: 53 in. 4XL: 56 in. Ref: UTMW521