The Icebreaker Men's Compass Short Sleeve Shirt is a stylish summertime button-up featuring our Cool-Lite(TM) fabric. Cool-Lite blends soft, breathable and odor-resistant merino wool with natural Tencel(R), and we added a touch of Lycra(R) for added stretch when you're on the go. Features: 150 Ultralight 47% Wool, 31% TENCEL(R), 22% Polyester Medium = 221 g / 7.79 oz