Constructed from moulded polyurethane foam. Contoured profile provides ultimate comfort and relief. Provides relief to endangered areas when sitting for longer periods. Lightweight and easy to transport. Fitted cotton inner cover (outer covers available). Size: 44cm (17½”) diameter x 8cm (3″) deep. Please note that this product can normally be manufactured by our UK supplier and be available within 2/3 days of receiving your order.