Advanced grades. Black Swan chose the OEM of international bra brand, and its technology and quality are not inferior. At the same time, Black Swan Bra has more than 100 patented technologies, covering health and comfort, breast shaping improvement and many other aspects. Appraised by the relevant supervision bureau, its brand products belong to high grade. Black Swan brand is committed to creating high-quality, black technology, extremely comfortable, elegant and noble underwear, focusing on showing women's ideal chest shape and natural curve.