Aerosoles A2 Women's Sleep Walk, Grey, 8.5 M US 100% Synthetic Imported Synthetic sole Shaft measures approximately 6.5" from arch Heel measures approximately 3" Platform measures approximately 0.5 Boot opening measures approximately 5.5" around Ankle boot in faux leather featuring harness buckle and pleated front shaft Double-padded memory foam insole Sueded sock insole Diamond-pattern sole