Product details:

Smartwool Merino Sport 150 Short Sleeve Button Down - Men's Light Gray Heather Large SW016203545-L. Engineered mesh is placed in key areas to increase Merino's breathability and comfort while a flatlock seam construction helps to eliminate chafing. With additional vents at the top of the back for breathability Smartwool's Sport fabric combines the sweat management temperature regulation and odor resistance of Merino with the added durability and quick drying time of polyester.