Playtex USE525 18 Hour Posture Bra Black 40C Soft wireless bra features supportive construction for excellent comfort. Made of nylon and spandex. Wireless, non-stretch shaped cup is lined with silky microfiber for support. Magic Rings padded inner side support sling for extra lift. Jacquard-knit cup overlay with a gleaming pattern. Padded undersides of cups for support. Hook-and-eye closure at front with soft backing and coated metal hardware. See Fitter's Comments below for hook count. Sides are tall stretch microfiber with covered elastic at top and sewn-on elastic at bottom. Center pull ComfortCushion padded front straps, with exposed elastic straps at back that adjust with plastic hardware. Kicked-in back straps help keep prevent slipping. Tall, smoothing PowerSupportX back has inner crossed microfiber bands for improved posture.