Worn once Smartwool Men's Merino Sport 150 Tech Tee Size L Black. Description Talk about a shirt that wants to help keep you cool. Our Men's Merino Sport 150 Tech Tee combines performance, comfort, and breathability—making it perfect for your next sweat-inducing adventure. We've placed engineered mesh in key areas to increase Merino's breathability and comfort, while a flatlock seam construction helps to eliminate chafing when you're out moving/adventuring. With additional vents at the top of the back for breathability, our Sport fabric combines the sweat management, temperature regulation, and odor resistance of Merino with the added durability and quick drying time of polyester. Features Regular Fit Flatlock seam construction designed to minimize chafing Vents at the top of the back for additional breathability Body - 56% Merino Wool, 44% Polyester; Lower Back Panel/Side Panel - 54% Merino Wool, 46% Polyester Garment Weight: 132 g = 4.66 oz