93% Silk and 7%Spandex (exclude elastic band), 19mommes, super pretty and extremely comfortable, no padding whatsoever, Woven Satin Fabric Looks Luxurious 1/2" gap between two cups, three-column and one-row hook-and-eye back closure, adjustable straps, extra closure tab supplied in case you need to make the rip cage band wider Simple design and wonderful looking, best suited for small breats size (A-C cups), the triangle cup is not wide enough, it may falls out if you are over a C cup Non padded wireless top have a two-ply construction for structure and modesty, free of wires