Patagonia Women's Fiona Mid Winter Boot 100% Nylon Rubber sole Shaft measures approximately 10 1/2" from arch Heel measures approximately 3/4" Boot opening measures approximately 13 1/2" around Medial side zippers for easy entry Handle flaps can be pulled up for easy on and off Primaloft Eco insulation provides warmth Stretch neoprene for rear leg custom fit; TPU pull handle for long term durability DWR treated softshell upper