From the Duluth Trading description: Made-in-the-Jade™ technology with microscopic jade embedded in fabric feels cool to the touch 6.1-oz. 76% nylon/24% spandex interlock knit fabric wicks to pull moisture off your skin Longline silhouette for more coverage Removable soft foam cups are hole-punched for boundary-busting airflow Bust darts provide shaping Wicking finish whisks sweat off your skin for fresher, drier comfort Antimicrobial finish resists stink Machine wash