FitFlop Women's Superboot Boot 100% Suede Rubber sole Shaft measures approximately 16" from arch Heel measures approximately 1 3/4" Platform measures approximately 1" Boot opening measures approximately 16" around Tall boot in suede featuring double full-length zippers on either side and notched cuff Patent-pending MICROWOBBLEBOARD midsole technology fuses three diagonal sections of triple-density EVA into a single, seamless, underfoot platform to absorb shock and diffuse high-pressure spots