Nike Pro Bra Origins The Nike Pro bras: A team of six absolutely perfect styles made for every size, workout and support level. How did Nike do it? By obsessing over every detail. A team of designers consulted 1,424 women and then developed 120 versions of the chest band, perfecting every element down to the thread and thread count. The result? Each new bra is 10 to 27 percent lighter and 35 to 60 percent stronger than its predecessors. Unique design details set each style apart to create the right support for your sport. More Benefits: Best for A, B and C cups. Stretchy spandex for freedom of movement and an athletic fit. Product Details Fabric: Dri-FIT 88% polyester/12% spandex. Machine wash. Imported.