LeatherImportedLeather or Nubuck Upper. Microfiber Wrapped EVA Footbed. TPR Outsole.Received APMA (American Podiatric Medical Association) Seal of AcceptanceYOUR NEW FAVORITE MULES: The infinity chic Adeline mule-style slide embodies luxury and comfort. Leather or nubuck uppers are accented by piping and posh metallic horsebit detail across the vamp.VIO MOTION SUPPORT is concealed within every Vionic shoe, supporting every step from the ground up so you can confidently move in unmatched comfort. Full biomechanical contact hugs your foot’s natural curves, providing essential support in all of our casual, dress and active shoes and slippers.Vionic supports you, so you can Walk. Move. Live.