Choosing the right mattress firmness is key for a comfortable sleep while picking the wrong firmness for your body and sleeping position can lead to pain and discomfort. But mattress firmness is subjective, because each individual applies a different amount of pressure to the sleep surface based on their weight, the same mattress is likely to feel softer to a heavier person and firmer to a lighter person. Lighter people (under 150lbs) may find medium-firm to firm mattresses too hard, while…