Features of the Smartwool Men's Merino Sport 150 Glouton Tee Moisture management, temperature regulation, and odor resistance of merino with the durability and quick dry time of polyester Flatlock seam construction designed to minimize chafing Offset shoulder and side seams designed to increase comfort and minimize chafing while wearing a backpack Fabric Details 56% Merino Wool, 44% Polyester