We surveyed millions of women to help us develop the perfect bra. Not only is our Sleep Bra the most comfortable bra on the planet, it shapes, lifts and supports in a way no other bra can match. Its silky, soft, stretchy fabric actually stretches to fit any cup size from A to DD. AND it conforms to changes in your body maintaining a perfect fit any time of the month. We guarantee this to be YOUR FAVORITE BRA. It is so comfortable you can even sleep in it (many women do because they forget they have it on). Fashion nylon/spandex import is machine washable and still maintains its shape and comfort.