FitFlop Women's Hyka 100% Leather and textile Rubber sole Heel measures approximately 1 1/2" Platform measures approximately 1 Aegis treated microfiber lining Slimmer last and rounded to shape 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!