The vogue plasma star orthopaedic mattress features an 28cm deep firm open coil orthopaedic spring with 6 gauge frame and 3cm of latex foam fillings the perimeter zone system features provides a firmer spring around the perimeter of the mattress providing extra support this model features soft touch knitted luxurious fabric with additional polyester hypo allergenic fillings the mattresses has stitched borders with 4 flag stitched handles and vents