Tecnica Women's Soft II Winter Moon Boot 100% Textile and synthetic Rubber sole Shaft measures approximately 12 1/2" from arch Heel measures approximately 1 1/2" Platform measures approximately 3/4" Boot opening measures approximately 13" around Premium 3D anatomic drop-in footbeds and midsoles provide great fit, superior insulation, exceptional comfort and all day walkability TecniTherm Insulation