Pull on the Aero Short Sleeve crewe before going out for a run or a hike and it's like putting on two shirts. The Aero is superlight and breathable, made from 120gm merino jersey, feels great against your skin due to flatlock seams and a scoop neckline, and fits your body perfectly. When you finish your hike or your run, you'll be wearing a flattering, feminine crewe neck tee that magically eliminates the odor from your workout. It's as if you brought an extra shirt, only you don't have to carry it. Magic!