- Upper: Full-grain (caramel, desert, denim blue, pomegranate, cemento, onyx, chestnut) or Nubuck (oatmeal, black, mahogany, white) leather - Lining: Calf skin - Midsole: Vegetable tanned soling leather - Insoles: High density memory foam - Our full-grain and nubuck leathers are of the highest quality and will become more beautiful as they age. Please note that since leather is a natural material, there may be slight color, texture, and grain variations.