Soft cotton-blend knit bra comes with optional pads for smooth coverage. Made of cotton, modal, and elastane. Wireless triangle-style cups are seamless and lined with same fabric to create pockets for removable padding, included. Plunge neckline has covered elastic at the edges to keep fit close. Soft Calvin Klein logo elastic underband secures hold and light support. Sides and back are cotton blend with covered elastic at the upper edge and underband below. Extra soft elastic straps have highly restricted stretch and fully adjust at back with coated metal hardware. Center-pull straps convert into a crossed back with coated metal S-hook hardware. Fabric info tags are sewn onto inner back. Padded closure at back has coated metal hook-and-eye hardware. See Fitter's Comments below for hook count.