SLEEK SUPPORT. The Nike Sports Bra has a smooth, second-skin fit with sweat-wicking power. Perforations on the front with slits and an open-back design help you stay cool. Benefits Dri-FIT technology helps you stay dry and comfortable. Open back lets air flow to help keep you cool. Smooth, sleek fabric has a second-skin fit. Product Details Tight fit for a body-hugging feel Body: 77% nylon/23% spandex. Lining insets: 71% spandex/29% nylon. Machine wash Imported Style: AV4432;Color: Kumquat/Clear; Size: S; Gender: Female