The Calvin Klein Women's Modern Cotton Bralette is a top-selling racerback bra on Amazon. It features a comfortable and stylish design, with a racerback silhouette and a wide elastic band for added support. Made from a blend of cotton and modal, this bralette offers a soft and breathable feel. It is perfect for everyday wear or for lounging around the house. Available in various colors and sizes, it is a popular choice among women looking for a comfortable and fashionable racerback bra.