OKA b Black Rhinestone Star Sandals M/L 8/9 Soft, matte finish. Shape designed for a wide range of foot shapes. Straps that lie flat against your feet prevent chafing. Premium arch support and heel cup for stability and support. Soothing massage beads. Flexible shoe designed for all-day comfort. Shoe is 100% recyclable (plastic symbol #3) and made from a blend of used shoes, scrap material, and our own proprietary bio-based material. Bio-based material contains 45% soy by weight and is BPA, latex, rubber, and phthalate-free. Waterproof and slip-resistant.