Most manufacturers describe firmness on a scale from 1 to 10: - 1–3: Soft - 4–6: Medium to medium-firm - 7–10: Firm These numbers are not industry standards and should only be used as rough comparisons.
Materials
Why Do Mattresses Have Different Firmness Levels?
Quick Answer
Mattresses are made in different firmness levels because people have different body weights, sleeping positions and comfort preferences. A mattress that feels medium to one person may feel firm or soft to someone else.
Typical firmness scale
Key Takeaways
Firmness describes comfort, not support. There is no universal firmness rating across manufacturers. Body weight and sleeping position affect how a mattress feels. The best firmness is the one that keeps your spine comfortable and properly aligned.
Question
Mattress firmness is one of the most misunderstood parts of buying a bed. There is no universal firmness standard, and manufacturers use different materials and construction methods to achieve their comfort levels. Understanding what firmness really means can help you choose a mattress that provides both comfort and support.