Marmot Men's Edgewood Long Sleeve Dri-release Wool 88% Polyester, 12% Wool Imported Wool for Breathability and Natural Warmth Soft, Comfortable, Lightweight Performance Knit Fabric Ultraviolet Protection Factor (UPF) 30 Dri-Release for Permanent Moisture Wicking and Quick - Drying Properties Flat-Locked Seams for Added Comfort