The Karenna is a completely adjustable sandal with a backstrap. This sandal has a hook & loop closure at both the instep & front strap. The Karenna features side panels for additional support. Naot's removable, anatomic cork & latex footbed is wrapped in pampering suede and molds to the shape of the foot with wear. The Low Flexi Collection features a 1.25" polyurethane sole which is extremely lightweight and durable.