Mattress specifications 600 pocketed springs independent springs each respond to the contours of the body upholstery includes 23mm memory foam moulds to the shape of your body polyester fillings offering supreme comfort 3 rows of side stitching extra support to help keep the spring in place knitted mattress panel medium tension this mattress is available in medium tension only standard base option this base is supplied from the bedstar star ultimate collection the headboard is not