4'0 SMALL DOUBLE TUFTED MEMORY FOAM MATTRESSbr Click below to buy on Amazon: br 10 INCH THICK 40 SMALL DOUBLE MATTRESS br 135 OPEN COIL BONNELL SPRING FOR EXTRA SUPPORT br 4CM HIGH DENSITY MEMORY FOAM br UK FIRE RETARDANT BS7177 br MADE IN THE UK DIRECT FROM THE MANUFACTURER