Our most luxurious mattress topper, filled with siliconised ball fibre in a 100% cotton cambric cover for optimum comfort. The Duke mattress topper has a special box construction to prevent the filling from moving around. Attaches to the mattress via elastic straps at each corner. Box construction may require some manipulation. Filling: siliconised ball fibre. Fitting: elasticated bands. Cover: 100% cotton cambric. Weight: 1,300g/m².