Vitamin A’s strappy chic multi-string hipster, with matte gold accents. Smooth, clean-finished construction for a flawless fit. Full back coverage. Black EcoLux™ Fabric: The basis for Vitamin A's iconic LBB, this EcoLux™ classic black is a superfine matte jersey with a subtle sheen. EcoLux™ is a blend of Repreve®RECYCLED nylon fiber and XTRA-LIFE LYCRA® fiber for a gorgeous, long-lasting fit.