I purchased this new, but I accidentally bought the wrong size, so I'm listing it here in the hopes that someone who fits it can use it. The cups feature the "Koi Suru Bra's" unique soft stretch cups that fit perfectly to the body's movements and create a natural silhouette. The holes at the bottom of the cups provide good breathability. The cup lining is a cotton blend. The back is a flat design made with recycled nylon yarn fabric. It's less likely to show through outerwear. The cups have stretch control on only a portion of the sides, which provides a gathering effect for the bust. Sizes C cup and up have side boning. The wire at the front center is thin and flat, and the "NEW Angel Wire (R)" is curved outward, making it less likely to dig into the skin and cause pain.