The Super Ortho mattress is 25cm deep and features a strong 12.5g open coil spring system. This is a firm feeling orthopaedic mattress which is perfect for those looking for a firm and supportive sleep. Ortho sprung mattress are suitable for someone who likes the firmer feel, and looking for additional support along the pressure points of the body. The Super Ortho mattress is a turn and rotate mattress, finished in a quality damask fabric featuring an attractive striped pattern. Filled with layers of sumptuous and naturally hypoallergenic polyester encased in satin pads, and a layer of flex support foam for additional support. It also features air ventilators to enable the mattress to breathe and flag stitched handles to allow easy rotating. This mattress has been hand tufted for a quality finish. Features and Benefits 12.5g Open Coil Spring System- The strong 12.5g open coil spring system is designed to distribute weight evenly across the surface, providing excellent posture support with a firm comfort.