Dorchester Orthopaedic MattressThe Dorchester mattress has been developed to cater specifically for those suffering from back and joint pain. This is a firm mattress which distributes your body weight evenly to avoid stress on pressure points and stopping your back sinking into the middle which can happen with softer mattresses. Please note as with all our mattresses we may change the cover fabric from that in our pictures to a different one in line with changing trends .