Having been authorised by the orthopaedic advisory board the sealy aspen posturepedic mattress has been designed to provide additional support for you back and shoulders whilst you sleep the posturetech 620 springs built in to the mattress respond to the shape of your body to dispense the weight from the heaviest parts of the body this in turn allows for a relief of pressure points between you and the mattress meaning your rest is less likely to be disturbed by tossing and turningthe matt