This tank's distinct details separate it from the competition. Constructed of lightweight Merino wool with a touch of nylon, the Aria tank is ideal for summer hikes, challenging yoga classes, and early morning runs. A flattering cowl neck and pintuck shoulder details make it work for a quick trip into the office. The lightest weight Merino tank. Semi-Fit. Soft cowl neckline. Subtle darts at shoulders. A nylon core is wrapped with wool to create a hardy fiber without bulk or weight. Weightless Wool is designed to be softer, more durable and lighter than synthetic workout fabrics. A perfect fabric when used alone for warmer days of aerobic work or layered to add warmth in colder activity. 145g/m2. 87% Merino, 13% Nylon.