Naot Women's Viento Water Resistant Boot Black The Naot Viento is an upper calf boot with an inside zipper. This style has a heel cup for stability and support. Naot's removable, anatomic cork & latex footbed is wrapped in microfiber & leather and molds to the shape of the foot with wear. 13" Shaft Height. 14.25" Shaft Circumference. Naot Women's Viento Water Resistant Boot Black