Naturalizer Women's Illy Ankle Boot 100% Leather Synthetic sole Heel measures approximately 3.25" Flexible insole gives with your foot as you walk for soft-feeling steps. Lightweight thermoplastic rubber outsole delivers an effortless stride. Ergonomic toe and heel shapes provide superior stability and balance. Leather upper, knit upper lining, polyurethane sockliner, polyurethane foam insole, steel shank... Thermoplastic rubber outsole. Heel Height: 2 3/4 inches. Shaft Height: 4 inches.