From the essential Micro ADV Collection. Start your day right. Optimal sweat-wicking tech that helps keep you dry pairs with stretchy, super-breathable fabric so your last concern is sweat where you don't want it. Nike Dri-FIT ADV technology combines moisture-wicking fabric with advanced engineering and features to help you stay dry and comfortable. Stretchy mesh fabric is ultra-breathable and lets you move freely. Wide hems help keep underwear in place. Flat seams feel smooth against your skin.