Our deepest and most comfortable mattress topper. Add an extra layer of comfort to your mattress with our extra filled 4″ deep mattress topper. The supersoft ball fibre is guaranteed to keep is shape and loft night after night providing the best support and sleeping comfort. The ultra fine filling is tightly packed giving a soft but plump supportive sleeping surface for maximum comfort ensuring there are no annoying flat spots. Elasticated corner straps hold the topper firmly in place and the cassette stitched construction ensures the filling remains even. These toppers are encased in a luxury, 233 thread count 100% cotton percale cover. The luxury tightly woven cover is impregnable to dust mites, making this topper the ideal choice for anyone that suffers from allergies. Our most luxurious topper yet.