Designed for movement and high exertion, Capilene Cool Lightweight is our lightest, fastest-drying, best wicking technical fabric for hot days. It moves moisture quickly and breathes exceptionally well to keep you cool and dry across the full range of active, high-output agendas. Made of 100% recycled polyester double knit (heathers have 52% recycled content), Capilene Cool Lightweight has a smooth outer face that glides easily in any layering system; it feels weightless, airy and free on the skin and with HeiQ Fresh durable odor control, you won't stink up the celebratory beerfest at the end of your long run. Details include a classic go-anywhere crewneck design, set-in sleeves for chafe-free comfort and total shoulder mobility, a slight drop-tail hem for a stay-put fit under a harness or hip-belt and a clean, snag-free woven label on the front hem. It's Fair Trade Certified sewn, which means the people who made it earned a premium for their labor.