There is no correct degree of firmness. Some people may prefer a firm mattress, while others prefer a soft mattress. Many choose a medium-firm mattress.
Most people over 80 kg would benefit from choosing a firmer mattress with good stability. However, the mattress should never be too firm as this will hinder comfort and prevent you from getting a good night's sleep.
Lighter-weight people would benefit from choosing a softer mattress. But you should never choose a mattress that's too soft, as this may result in a hollow back. Your spine always needs to be aligned in order to prevent back pains.
Nowadays, most standard mattresses are medium-firm. They are designed as universal models to suit most people, regardless of body weight or preferred sleeping position. That said, as we have discovered in our reviews, different types of people will still interpret the comfort level of different mattresses differently.
That's why we've developed a Sleep Hero firmness scale, which we use to evaluate the degree of firmness of a mattress in our reviews. This will give you a good indication to the degree of firmness, allowing you to immediately exclude mattresses that do not match your body size or preferred sleeping position.
To choose the level of firmness that's right for you, have confidence in your judgment about what feels best. Ultimately, your mattress needs to be comfortable. Our sheep can help guide you.