100% silk. Dry clean only. Fully lined. Back zipper closure. Front cut-out. OLCA-WD15. 1346. If its feminine, sexy and luxe, its Olcay Gulsen. The designer, who launched her namesake line in 2011, has committed herself to designing clothes that make women feel good. Olcay mixes classic silhouettes with sultry details cut-outs, mesh, plunging necklines and zippers for unforgettable, statement making looks.