CW-X Women's Insulator Cold Weather Running Bra Polyester 80% / Spandex 20% Imported Provides a flattering silhouette and support for medium to high impact activities. Sport Support Bra offers our Targeted Support Web inner cup. Perfect for the active B/C cup Woman Auto Sensor fabric moves perspiration away from skin and regulates next-to-skin temperature Silver dioxide fiber makes fabric. Stretch mesh channel under each cup for moisture evaporation and comfort. Our Support Web offers stability without using compression. Quick-dry elastic base strap. Mesh back panel provides extra compression and support.