FitFlop Women's Crush Boot 100% Leather Imported Shearling (Fur Origin: China) Rubber sole Shaft measures approximately 8.5" from arch Heel measures approximately 2" Platform measures approximately 1.00" Boot opening measures approximately 14" around Aegis treated microfiber lining Adjustable strap Our patent-pending, original MICROWOBBLEBOARD(TM) midsole technology fuses three diagonal sections of triple-density EVA into a single, seamless, underfoot platform to absorb shock, diffuse high-pressure spots, and make your feet feel amazing!