Vionic has blended casual flip flops with unbeatable support so you can have the style you want while still getting the comfort your feet crave! They have biomechanically designed microfiber footbeds to hug your arches and a deep heel cup to help keep your foot in place. Vionic sandals are made with a leather upper and their built in orthotic is shown to be effective in helping to treat heel pain (Plantar Fasciitis).