Semi-firm mattresses offer the ideal compromise between firmness and softness, ensuring restful nights of sleep while preserving the health of your back.
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Often made of foam, these mattresses conform to the contours of the body without excessively sinking, thus providing adequate support and effective thermoregulation for a comfortable night. In conclusion, the semi-firm mattress is ideal for:
- All types of sleepers
- All sleeping positions
- People with back pain
Discover our semi-firm mattresses below
Balanced and economical

Firm and supportive
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The perfect support for peaceful nights and maximum comfort
Discover our collection of firm mattresses , designed for those who like to feel precise support, a well-aligned spine and stable support all night long, without sacrificing the softness that makes Morphea so charming.
Each mattress is designed to offer you the best comfort: a firm core for support, a plush feel for relaxation, and a bed that remains comfortable every day. Whatever size or dimensions you choose.
Because a good firm mattress is not a hard mattress.
It's a bed that welcomes you like a true cocoon, and takes care of your body as well as your sleep, especially when your bed base and bedding work together to optimize support.
Free and fast delivery. 10-year guarantee. Over 25,000 satisfied and rested sleepers, see their reviews .

Why choose a firm mattress?
A firm mattress provides greater comfort and stability thanks to:
- a natural alignment of the spine and a homogeneous distribution of pressure points,
- improved air circulation, limiting heat and humidity,
- firm support ideal for sleeping on your back or stomach.
- less risk of subsidence,
- A range of sizes to suit all sleepers and all bedrooms.
- Excellent value for money, with products that last over time.
If you sink into mattresses that are too soft or wake up with tension, a firm mattress can stabilize your movements and improve the quality of your sleep, regardless of the size or dimensions you choose.

What are the health benefits of a firm mattress?
A better supported and relaxed back
A firm mattress keeps the spine aligned and improves the quality of sleep. When the back is well supported, the body can finally relax.
It is this type of stability that reduces tension, limits small awakenings and promotes deeper and more restorative sleep .
Firm support is not a constraint: it is a solid foundation that helps your body breathe and relax more naturally.
A better distribution of pressure points
A firm mattress stabilizes posture and distributes weight evenly. The result: fewer sensitive areas, less aches and pains upon waking, and a more consistent feeling of comfort, regardless of your sleeping position.
Your body no longer needs to compensate: it rests on a surface that accompanies it exactly where it needs to be.
A firm mattress that really lasts.
A firm mattress is also distinguished by its durability. Dense foams, latex structures, or pocket springs retain their shape for a long time without premature sagging.
For you, this means a bed that remains stable, year after year, and a quality of sleep that does not weaken.
Many models incorporate up to 7 distinct comfort zones (head, shoulders, hips, lumbar region, pelvis, calves, feet) as well as highly ventilated springs. The result: less heat buildup, improved mattress breathability, and more consistent comfort night after night.
Pair your foam, pocket spring or hybrid mattress with a quality bed base , thus guaranteeing durable bedding, year after year.

Who is a firm mattress recommended for?
You are making a very good choice if you:
- sleep on your back or on your stomach
- You need to limit the sinking to stabilize your bed (especially if you sleep with a partner)
- look for a strong but comfortable support
- you need more tonic support
- if you have back pain and want to reduce pain upon waking
Note: For body types over 95 kg, a higher level of support may be recommended to maximize your comfort.
Sizes and prices of our firm mattresses
Whether you are looking for a mattress for a single bed, a double bed or a king size, our mattresses are available in all standard sizes: 90x190 , 140x190 , 160x200 , 180x200 .
Each product is offered at a clear, transparent price, with payment options available. This allows you to tailor your bedding to the size of your room, your budget, and your comfort level, without compromising on the quality of support.
Everything you need to know about mattress firmness
Choosing a medium-firm, firm, or very firm mattress depends not only on your body type but also on your sleeping habits. The mattress's level of support is also determined by its technology, which can be foam, memory foam, or latex. Find below all the information you need to choose the firmness of your mattress.
What is the firmness of a mattress?
Firmness refers to the level of support the mattress provides when your body exerts pressure. It depends primarily on the density of the foams, the type of pocket springs, or the hybrid technology used.
A good firm mattress should keep the spine aligned, limit sinking and distribute weight over key areas (shoulders, hips, lumbar region).
Firmness is different from being welcoming:
- The initial feel = the sensation when you lie down (supple, invigorating, enveloping)
- firmness = the internal structure that ensures support
The goal is simple: to find a mattress that offers firm, stable comfort adapted to your body shape, regardless of the size or dimensions of the bed.
What are the different levels of firmness?
At MORPHEA, we offer a range of mattresses designed to adapt to all body types, with the option of a 100-day trial . Determining the firmness level that best suits you is crucial to ensuring quality sleep.
Semi-firm mattress
A medium-firm mattress offers a perfect balance between comfort and stability, adapting to different body shapes and sleeping positions. It is supple and ideal for those seeking firm support with a soft, enveloping feel. Often made of foam, these mattresses conform to the body's contours without sinking excessively, thus providing adequate support and effective temperature regulation for a comfortable night's sleep.
FIRM MATTRESS
Firm mattresses are generally suitable for heavier individuals or those who prefer to sleep on their stomach or side. They ensure good motion isolation, promote air circulation, and effectively support the neck, hips, and spine, thus reducing the risk of the mattress sagging.
VERY FIRM MATTRESS
Especially recommended for heavier individuals, extra-firm mattresses guarantee optimal spinal support, regardless of sleeping position. Thanks to technological advancements, these mattresses now offer additional benefits such as improved blood circulation, pressure point relief, and natural spinal alignment.
Be sure to choose the level of firmness according to your body type, as a mattress that is too firm can cause sleep problems for some sleepers.
Which technology should I choose for a firm mattress?
The comfort of your bed depends as much on its technology as on the feeling you like when you lie down.
Each technology offers a different type of support and feel. Here's how to make the right choice in just a few moments.
✔ Foam mattress
The high-density foam ensures even support across the entire surface of the mattress.
This is the ideal technology if you want to:
- structured support that does not collapse,
- a lightweight mattress, easy to handle,
- a pleasant, clean sensation, without rebound effect.
It's the choice of sleepers who like a reliable and consistent sleeping surface, night after night.
✔ Memory foam mattress
Memory foam reacts to body heat to conform to your curves without feeling sagging. Recommended if you are looking for:
- a gentler or more enveloping welcome,
- a reduction in pressure points,
- a feeling of “tailor-made” comfort.
It is very suitable for those who sleep on their side or who want a relaxing, cloud-like surface.
✔ Pocket spring mattress
Pocket springs offer dynamic support and excellent airflow. Perfect if you want:
- a mattress that stays cool
- precise support zone by zone, an invigorating welcome
- excellent sleeping independence.
They are particularly suitable for back and stomach sleepers, as well as for people looking for a more invigorating sensation .
✔ Hybrid mattresses
Hybrid mattresses combine pocket springs and technical foams .
This is the most versatile and popular technology. It is recommended if you are looking for:
- deep and stable support,
- a softer or firmer feel depending on the model.
- enhanced ventilation,
- a mattress that adapts to most body shapes.
Morphea hybrid models (like JADE, VICTORIA, ESSENTIEL) offer complete comfort : breathable, stable, pleasant, and always balanced.
How can you tell if a mattress is firm enough?
Recognizing the right firmness is first and foremost about listening to your body. A mattress is considered firm enough when it supports your spine without creating pressure points.
Here are the signs that you are at the right level of firmness:
- Your back remains aligned: in a lying position, the pelvis does not sink and the lumbar spine does not arch.
- You can easily change position: a mattress that is too soft restricts movement and generates muscle fatigue.
- You do not feel excessive pressure or pain in your shoulders, hips or lower back.
- Your awakening is smooth: less stiffness, less feeling of heaviness in the body.
- Comfort remains constant regardless of bed size or the sleeper's dimensions.
Simply put: a sufficiently firm mattress should support you without restricting you, and accommodate you without engulfing you.
This is exactly the balance we're looking for in our Morphea mattresses: firm support, but a hotel-like comfort feel that is soft, breathable and reassuring.
What mattress firmness should I choose for back pain?
To ensure proper spinal alignment during sleep, especially in cases of back pain, the choice of mattress is crucial. Contrary to popular belief, a very firm mattress is not always the best option in this situation. It all depends on your body type and sleeping habits. It is often recommended to opt for a medium-firm or firm mattress, depending on your weight-to-height ratio.
What are the best firm mattresses?
When looking for a firm mattress, several criteria come into play: support, sensory comfort, advanced technologies (high-density foam, pocket springs, hybrids), durable support, efficient ventilation to limit heat, high-end finishes and value for money.
At Morphea, all our products are designed for firm support, optimal ventilation and premium nighttime comfort, ensuring dreamy nights.
Our range covers all bed sizes and all room dimensions. Here are the ones that best embody this promise.
1. JADE Mattress: Firm & Supportive
Voted Best Mattress for Back Pain by L'Express
- Thickness: 26 cm, hybrid composition combining memory foam + pocket springs.
- 7 ergonomic zones, for precise and even support according to the areas of the body.
- Firm welcome + firm support: a stable, firm bed feeling, ideal for aligning the spine and preventing hollows.
- Excellent sleeping independence, perfect for couples.
- Firm and dynamic comfort. A Morphea bestseller for those seeking precise, lasting, and uncompromising support.
2. VICTORIA Mattress: Luxury & Softness
Voted Product of the Year 2025
- Generous thickness: 30 cm, hybrid technology with memory foam + 2.0 pocket springs.
- Integrated mattress topper for a very enveloping feel, while maintaining firm and even support.
- 7 ergonomic comfort zones, to adapt the support according to the parts of the body (head, shoulders, hips, legs).
- Ventilated foam technology + springs to ensure ventilation and temperature regulation, for optimal comfort night after night.
- The result: a firm, high-end mattress that combines hotel-style comfort, ergonomic support, and enveloping softness .
3. The Essentials — comfortable and reliable
Structure designed for a firm welcome and lasting firm support.
- Ideal for those who want a stable, clean and uncompromising mattress with serious spinal support.
- Excellent value for money, without unnecessary extras, for firm, effective and lasting comfort.
- A firm mattress that is more than comfortable, understated, effective, which focuses entirely on robustness and consistent support.
4. The Elite - a warm welcome and firm support
Premium design with multiple layers to combine a snug, enveloping feel with firm support.
- A cocooning sensation from the very first moments, while guaranteeing firm and lasting support.
- Excellent durability, premium ventilation and comfort, ideal for those looking for a firm bed while having the “pleasure of slipping into a cloud”.
- The result: a premium firm mattress, designed for those who want to sacrifice nothing, neither comfort nor firmness.
Why do these models stand out as the best?
Made in Europe, they combine cutting-edge technology (hybrid, pocket springs, memory foam) and high-end finishes (generous thickness, certified materials, adapted comfort).
- They offer firm support without rigidity, lasting stability, high sleeping independence, and surface comfort adapted to your preferences (firm, enveloping, soft).
- They are designed to adapt to multiple body shapes and sleeping positions (back, stomach, side)
- Finally, they embody the Morphea spirit: well-being, softness, lasting comfort , without compromising on firmness and support.
Each mattress is designed as a premium bedding product, where technology, choice of foam, type of springs and comfort zones work together to offer you truly restorative nights.
Thousands of sleepers have already been won over by Morphea comfort. Try your mattress for 100 nights, with a 10-year guarantee and a fair price accessible to all.
How to care for a firm mattress?
Like all quality mattresses, it deserves simple but regular maintenance to retain its comfort and longevity.
Here are some best practices for properly maintaining your mattress:
✔ 1. Air it out every week
Remove the duvet for 10–15 minutes to allow the natural moisture associated with sleeping to evaporate.
✔ 2. Use breathable protection
A breathable mattress protector protects bedding without altering the surface feel or the ventilation of the mattress.
✔ 3. Flip or rotate the mattress if necessary
According to the design:
- Some models are double-sided.
- others only need to be rotated (head/feet)
This helps to prolong firmness and lifespan.
✔ 4. Clean the cover regularly
If the cover is removable, opt for a gentle wash.
If it is fixed, a light textile cleaning is sufficient.
✔ 5. Use a suitable, high-quality bed base
A suitable bed base ensures better air circulation and preserves the support of the mattress. Your bedding will last longer if the bed base properly supports the mattress.
✔ 6. Do not fold the mattress
Dense foam, latex or pocket springs do not like to be bent: this guarantees lasting firmness and no deformation.
Essential characteristics of a good firm mattress
- Suitable thickness (24–30 cm recommended)
- Efficient ventilation to limit heat
- High density
- High-quality pocket springs for the hybrid
- Certified materials , manufactured in Europe
- Certified dust mite- resistant technologies
- Long-term warranty
Size options to suit all rooms (140×190, 160×200, 180×200...)
100 night trial
Try your new mattress for 100 days to form your own opinion.
Free delivery
Enjoy free delivery and get your product delivered within 3 to 7 days.
Payment in up to 24 installments
Feel free to pay in installments with our partners Alma and Younited Pay.
Responsive customer service
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