Arc'teryx Men's Gryson Long Sleeve Shirt 100% brushed polyester Imported Button-Fly closure Machine Wash GRYSON LS SHIRT - The Gryson is a shirt for fall days in mountain towns. The Pulaski polyester flannel is brushed for warmth and softness. BREATHABLE MATERIAL - Allows moisture vapour to escape, helping regulate temperature and elevating comfort inside garment. LIFESTYLE - Technical outdoor functionality, comfort and durability brought to everyday designs.