80% Merino Wool, 20% Polyester. Design: Plain. Neckline: High-Neck, Zip Neck. Sleeve-Type: Long-Sleeved. Fabric Technology: Antibacterial, Breathable, High Warmth, Isotherm, Lightweight, Moisture Wicking, Quick Dry. Ventilated, Woven Label. High Performance. Size 16 UK measures 41 inches.