Vionic Catarina Sandals - Riveting details in metal tones accent the vamp of this natural raffia-wrapped wedge. Leather uppers with microfiber-covered footbed. Natural raffia-wrapped wedge. The Vionic wedge collection includes an enhanced forefoot contour in each footbed for greater comfort and hours of wearability, as compared to a regular wedge. Recommended by Dr. Andrew Weil.