Dorchester Ultra Firm Orthapeadic MattressThe Dorchester mattress has been developed to cater specifically for those suffering from back and joint pain. This mattress contains a specialized Orthopedic spring which is much firmer than normal. 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