The String is a gladiator-inspired sandal. It has a perforated design, with an underlay for added design. The padded adjustable ankle strap and the gores add comfort when walking. Naot's removable, anatomic cork & latex footbed is wrapped in pampering suede and molds to the shape of the foot with wear. The Allegro Collection features a 1.5" polyurethane sole which is extremely lightweight and durable.