New Balance Women's WO1099 Boot 100% Synthetic and fabric Vibram sole Shaft measures approximately 5.5" from arch Heel measures approximately 1.5" Boot opening measures approximately 9" around Boot with water-resistant seamless upper featuring lace-up front, gusseted tongue, and logo emblem at each side C-CAP EVA midsole for cushioning 200g Primaloft Eco insulation Vibram Ice Trek outsole for traction