El Naturalista Women's N722 Nido Boot 100% Leather Imported Rubber sole Shaft measures approximately 7" from arch Boot opening measures approximately 10.5" around Handmade and designed in spain Spanish leather is vegetable tanned to be gentle on the environment Anatomically designed cushioned footbed with arch support Removable insole made from recycled pu Rubber gives our soles flexibility and durability and they are slip resistant and biodegradable