Merrell Women's Encore Kassie Mid Waterproof Fashion Boot Leather Imported Rubber sole Shaft measures approximately 6.5" from arch Platform measures approximately 0.5 inches Boot opening measures approximately 11.25" around Full grain waterproof leather upper Kinetic Fit Base removable contoured insole for flexible support Merrell air cusion in the heel absorbs shock and adds stability M Select GRIP outsole tunes each outsole with durable traction that grips when and where you need it