The Castelo sandal features two hook and loop straps across the foot providing the perfect fit. The leather lining allows for all day comfort, while Naot's removable, anatomic cork & latex footbed is wrapped in pampering suede and molds to the shape of the foot with wear. The Utopia Collection features a 1.25" polyurethane sole which is extremely lightweight and durable. American Podiatric Medical Association (APMA) Accepted for promoting good foot health. The patented Naot Replacement Footbeds are also available for Castelo.