Icebug Women's Cortina BUGsole Studded Winter Boot Rubber Shaft measures approximately 9" from arch Heel measures approximately 1 1/4" Boot opening measures approximately 11 1/2" around Comes with removable BUGweb with 6 carbide studs for added traction BUGsole 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