Made from brocade exclusively developed for corsets. 70% Cotton & 30% Polyester Brocade lined by 100% Cotton twill.. 10 Spiral steel bones are distributed all around the corset. 2 Flat steel bones at back for better lacing grip and stability. All bones are placed under cotton bone casing. Metal busk front opening. Lace up back. 6.5 - 7.0 meters long lace for tight lacing the corset. Grommets in the back 12 x 2 = 24 total