Icebug Women&#39;s Cortina BUGrip Studded Snow Boot,Icebug" /> Synthetic Rubber sole Shaft measures approximately 9" from arch Heel measures approximately 1 1/4" Platform measures approximately 1" Boot opening measures approximately 12" around BUGrip outsole with 16 carbide studs for traction on ice and snow Traction rubber for grip on all surfaces Insulated water resistant ripstop nylon upper Warm fleece lining Long side zip and decorative lacing Ortholite removable insock liner Comfortable running shoe platform