The Oyster is an ankle boot with a unique contrasting swirl design. This style has padded technical lining for ultimate comfort & warmth. The Oyster features a zipper closure for adjustability. Naot's removable, anatomic cork & latex footbed is wrapped in pampering suede and molds to the shape of the foot with wear. The Shell Collection features a 1.5" polyurethane sole which is extremely lightweight and durable. Our patented Naot Replacement Footbeds are also available for Oyster.