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Firm mattress: how to know what the ideal firmness is

Firm mattress: how to know what the ideal firmness is

Published by Leafsleep on 27th Aug 2025

Choosing the firmness of your mattress is one of the most important factors in ensuring a restful sleep and looking after the health of your spine.
However, many people are unsure whether to choose a soft, medium or firm mattress.
The answer depends on a combination of factors such as body weight, sleeping posture, personal preferences and possible health problems.

What is the firmness of a mattress?

Firmness refers to the initial sensation when you lie down, i.e. how "hard" or "soft" the mattress feels.
This characteristic is directly related to the materials used in its manufacture, such as foams, cushions and the density of the components.

It is important to differentiate between firmness and support:
a mattress can be soft and still offer excellent support to the spine.

We recommend reading our article on how to choose the ideal mattress, where we explain in detail the materials and types of mattresses available.

Types of mattress firmness

White or soft mattress

  • Ideal for those who enjoy the enveloping sensation of being seated.

  • Recommended for people who are underweight and who sleep on their sides.

  • Relieves pressure points in the shoulders and hips.

Luxury Gel Mattress - Ensacados Muelles

Perfect for those seeking maximum comfort and softness.
Its structure of bagged cushions offers individualized support, independence of movement, great durability and ergonomic adaptation to the body.

Medium firm mattress

  • Balance between comfort and support.

  • Suitable for most people, especially those who sleep sideways or with their mouths down.

  • A good option for couples with different sleeping preferences.

Energy II mattress - Foam

It adapts to different body types and postures.
It offers a warm feeling thanks to its high-density core, which guarantees stability and correct alignment of the spine.

Firm or high-firmness mattress

  • Ideal for those who need additional support or suffer from back pain.

  • Recomendado para personas de más de 90 kg o que duermen boca arriba o boca abajo.

  • It keeps the spine well aligned, although it can be hard for those who prefer a softer feel.

Energy mattress - Foam

It stands out for its high firmness and block of great resilience. Excellent value for money, ideal for second homes or rental houses.

How to choose the ideal firmness for you

Considered body weight

  • Slighter people → softer mattresses.

  • People with more weight → firmer mattresses that prevent sinking.

Think about your sleeping position

  • On the side: softer mattresses to relieve pressure on the shoulders and hips.

  • Mouth down: medium to firm, to maintain adequate support.

  • Mouth down: high firmness to avoid excessive curvature of the spine.

Si tenéis achores de espalda o cervicales

In cases of lumbar pain, the ideal is a medium or high firmness.
However, it is advisable to consult a physiotherapist or specialized doctor.

There is no perfect firmness for everyone.
The secret is to find the balance between comfort and support, taking into account the physical characteristics and personal needs of each person.

At Mercado del Colchón, we offer a wide range of mattresses of different firmnesses and materials, all manufactured with guaranteed quality.
If you still have questions, we would be delighted to help you find the ideal mattress - contact us by 10pm to receive personalized advice.