MILLY Wave High Waist Bikini Bottom in White. - size L (also in S,XS) MILLY Wave High Waist Bikini Bottom in White. - size L (also in S,XS) Self: 76% polyamide 24% elastaneLining: 92% poly 8% elastane. Hand wash cold. Textured fabric. Stretch fit. MILL-WX180. 153 WS 09273. The MILLY collection epitomizes bold, advanced contemporary fashion with a feminine edge. Designer and founder Michelle Smith transforms classics by merging American sportswear silhouettes with distinctive Parisian atelier techniques. Smiths eye for impeccable detail, use of luxurious, cutting-edge fabrics and precise tailoring have made MILLY a cult favorite across the globe.