A firm mattress typically rates between 8 and 10 on the firmness scale.
Firm mattress or medium firm.
These beds are soft to the touch respond quickly to pressure and are less likely to have excessive sinking than a soft bed.
These beds have less give and offer a more stable even sleeping surface with very little sinking.
The medium firm mattress is a universal model found in most hotels featuring even levels of body contouring and push back or hug without feeling too soft or too hard.
The closer you get to the higher end of the weight spectrum the more likely it becomes that you ll prefer the firmer of the two.
People who weigh less than 120 pounds often find softer mattresses more comfortable while those of average weight between 130 and 230 pounds prefer medium to medium firm mattresses.
The reason for this is because if you re heavier you will put more pressure on your mattress and it will feel soft to you.
And the optimal support a medium firm mattress gives is for people who weight between 64 and 101 kg 10 16 stone.
Independent research has shown that the amount of support a mattress gives depends on your weight.
In other words a medium firm mattress is medium firm when averaging its various layers.