The Womens Smartwool Microweight Tee is the perfect t-shirt for any warm-weather aerobic activity, either alone or as an undergarment. Made of 100% Merino Wool, the Microweight Tee is the perfect combination of lightness with the most efficient moisture management material on the market. With flatlock seam construction eliminating chafing, this Smartwool tee is perfect to wear under the straps of a backpack. Keeping you dry and comfortable in a variety of conditions, the Womens Smartwool Microweight Tee should be a staple item in your closet that keeps you comfortable all year round.