Naturalizer Women's Novel Flat 100% Leather Synthetic sole Heel measures approximately 1.75" Flexible insole moves with your foot as you walk. Lightweight thermoplastic rubber outsole delivers an effortless stride. Ergonomic toe and heel shape provides enhanced stability for steady steps. Leather upper, suede fabric upper, polyurethane upper lining, foam insole, steel shank... Thermoplastic rubber outsole.