A fabric blend of 92% cotton / 8% spandex that allows the cup to mold to your breast and support its changing shape all day long. A sports bra style back that provides excellent upper-middle back support and holds the shoulder straps in place. Clips that lie flat under close fitting clothing and can be opened and closed with one hand. Cups that drop fully away from breast, giving the baby complete access. Adjustable shoulder straps for extra comfort. A wide under elastic for even weight distribution and under-breast support.