How to Choose the Ideal Mattress: Complete Guide 2026

Complete guide, based on sleep science, to choosing the right mattress in 2026. Covers types, firmness, materials, sizes, warranty, and how to test without making a mistake.

We spend a third of our lives on a mattress. Even so, most people choose one in 15 minutes in a store, based on price. Then they spend 10 years with back pain, feeling hot at night, and blaming stress. This guide was written to prevent that.

We won't sell you a specific model. We'll give you the vocabulary, criteria, and method to make a decision that will last a decade. At the end of the article, we provide concrete suggestions from the Dreamura range, but what you learn here applies to any brand.

Table of Contents

1. Why the mattress is more important than you think
2. The 7 factors that define the right mattress
3. Types of mattresses: spring, foam, viscoelastic, and hybrids
4. Firmness: how to discover yours
5. Sizes: single, double, queen, super king
6. Materials and what's inside
7. How to test a mattress (even online)
8. How much does a quality mattress cost
9. Warranty, return, and trial period
10. How to maintain your mattress for 10 years
11. Frequently asked questions

1. Why the mattress is more important than you think

During sleep, the body enters repair mode. It's in the deep phases that memory is consolidated, growth hormones are released, metabolism is regulated, and accumulated stress is reduced. Sleep duration and timing matter, but the physical support we receive during those 7-9 hours determines whether the body recovers or accumulates tension.

A wrong mattress causes three types of problems:

• Lower back and neck pain — spinal misalignment during the night. See our specific guide on mattresses for lower back pain.
• Fragmented sleep — pressure points that force you to turn dozens of times a night without reaching deep sleep.
• Heat and humidity — poorly ventilated mattresses accumulate temperature and prevent natural thermal regulation.

The cumulative consequence is a sleep debt that reflects in concentration, mood, immunity, and even long-term cardiovascular risk. Investing in a good mattress is, literally, investing in health — not luxury.

2. The 7 factors that define the right mattress

Before looking at models, complete this personal checklist. It guides the entire decision.

1. Sleeping position

Do you sleep on your side, back, or stomach? Each position needs a different profile of support and adaptability. We delved into this in what is the best sleeping position.

2. Weight and body type

Lighter people (under 60 kg) tend to need softer mattresses; those over 90 kg generally need higher firmness to avoid inadequate sinking.

3. Body temperature

If you feel hot at night, avoid dense viscoelastic foams without cooling fabrics. Consider pocket springs with a breathable layer or models with natural fibers. Also read how to sleep well in the heat.

4. Bed sharing

If you share a bed, prioritize motion isolation. See how relationships affect our rest.

5. Medical conditions or sensitivities

Dust mite allergies, herniated discs, fibromyalgia, pregnancy — each situation has requirements. Consult your doctor and see the guide how to sleep well during pregnancy.

6. Room space and aesthetics

Measure the room before choosing the size. And also consider the headboard and bed base — a good room decor helps you sleep better.

7. Sustainable budget

A quality mattress lasts 8 to 10 years. Divide the price by 3,000 nights to understand the real cost per night — almost always less than 30 cents.

3. Types of mattresses: spring, foam, viscoelastic, and hybrids

Pocket springs

Each spring is inside an individual textile pocket, allowing it to move independently. The result is excellent motion isolation, high ventilation, and zonal support. It's the technology of choice for those who share a bed, feel hot at night, or are overweight.

Examples from the Dreamura range: Takumi (26cm, springs + viscoelastic), Mizu (23cm, springs + high resilience), Sora (20cm, springs + high resilience).

High Resilience (HR) Foam

Foam that quickly recovers its shape after compression. It remains firm over time, is lightweight, transportable, and more affordable. Ideal for those who prefer a stable surface without sinking.

Example: Kumo (HR foam, extra firm, 20cm).

Viscoelastic (memory foam)

Adapts to body temperature and pressure, distributing weight evenly. Excellent for pressure point relief (shoulder, hip, lower back) and side sleepers. Can retain more heat — choose models with a cooling layer if you are temperature sensitive.

Example: Hisui (viscoelastic + HR, 26cm, extra firm).

Hybrids

Combine pocket springs with viscoelastic or latex foam layers. They try to offer the best of both worlds: spring support + foam adaptation. They are the dominant trend in 2026 and cover the widest range of needs.

Premium example: Samurai (high-end premium hybrid).

Quick comparison table

• Pocket springs — better ventilation, motion isolation, durability
• HR foam — affordable price, lightness, consistent firmness
• Viscoelastic — anatomical adaptation, pressure relief, great for joint pain
• Hybrid — balance between support and adaptation, maximum versatility

4. Firmness: how to discover yours

The right firmness depends on three variables: sleeping position + weight + personal preference. There is no universally good firmness.

Simplified guide

• Side sleeper + low to medium weight: medium or medium-soft firmness (e.g., Takumi, Mizu)
• Back sleeper + medium weight: medium to medium-firm firmness
• Stomach sleeper: high to extra firm firmness to prevent lower back sinking (e.g., Kumo, Hisui)
• Weight above 90 kg: firmness higher than usual (extra firm)
• Couples with different profiles: medium firmness + viscoelastic so both feel adapted

When in doubt, opt for slightly higher firmness — it's easier to soften with a topper like the Nemuke than to make a sagging mattress firmer.

5. Sizes: single, double, queen, super king

In Portugal, common sizes are:

• Single: 90x190 or 90x200 cm
• Standard Double: 140x190 or 150x200 cm
• Queen: 160x200 cm
• King: 180x200 cm
• Super king: 200x200 cm

Practical rule: the mattress should be at least 10 to 15 cm longer than the tallest person sleeping on it. For couples, 160 cm or more is recommended — the extra space significantly reduces sleep interruptions. If your room or bed is atypical, Dreamura offers custom-made mattresses.

6. Materials and what's inside

Always look at what's inside the mattress, not just the outer fabric. Points to check:

Certifications

Look for at least Oeko-Tex Standard 100 (absence of harmful substances) and, ideally, CertiPUR-EU for foams. For hotel use, the EN 597 flame retardancy standard is mandatory.

Fabrics

Cotton and Tencel are cooler and more breathable than pure polyester. Antibacterial and anti-mite fabrics are important for allergy sufferers.

Internal layers

The more distinct layers (spring + transition + viscoelastic + cotton), the more the mattress can combine support with adaptation. But more layers don't automatically mean better — it depends on the quality of each one.

Natural fibers as an alternative

For breathable pillows and toppers, fibers like bamboo, eucalyptus, and kapok offer ecological and thermoregulating alternatives. Read natural rest starts with the pillow.

7. How to test a mattress (even online)

Ideally, you should lie on the mattress for 10-15 minutes in all your usual positions. But this is only possible in a physical store. For online purchases, the real test happens at home — and that's why the trial period is essential.

In-store

• Go in the clothes you normally sleep in (not high heels)
• Lie down for at least 10 minutes in each position you usually use
• Pay attention to three points: lower back, shoulders, and hips
• Ask about the foam density and spring type
• See, feel, and hear the mattress recover — a good mattress recovers without creaking

Online

• Check if the brand offers an at-home trial period (minimum 30 nights, ideally 100)
• Confirm if returns are free and how they are processed
• Look for recent reviews (last 12 months) specific to your weight and position
• Use the Dreamura recommendation quiz to find starting points

8. How much does a quality mattress cost

Indicative price ranges in 2026 for a double mattress:

• Up to 300 euros: basic foam. Acceptable as a temporary solution but with a short lifespan
• 300 to 600 euros: good quality-price balance in pocket springs or HR foam
• 600 to 1,000 euros: premium mattresses, hybrids, superior quality viscoelastic foams
• Above 1,000 euros: high-end, noble materials, prolonged durability

Please note: paying more does not guarantee better. But paying too little almost always means making a bad deal over 8 years. Think about cost per night, not sticker price.

9. Warranty, return, and trial period

Before buying, clarify three different points:

Warranty

Covers manufacturing defects. In Portugal, the minimum legal warranty is 2 years, but quality brands offer 10. Check if it covers sagging (and, if so, from how many cm).

Trial period

Covers regret or unsuitability. Dreamura offers a 100-night trial, during which you can return it for free if the mattress does not meet expectations.

Legal right of return

For online purchases, you have 14 days to return due to withdrawal (Portuguese Consumer Rights Law). This is distinct and cumulative with the brand's commercial trial period.

10. How to maintain your mattress for 10 years

Small habits significantly extend lifespan:

• Rotate the mattress every 3 months (180 degrees horizontally). Only flip if the model is double-sided.
• Use a waterproof mattress protector: humidity and sweat are the main enemies. See our range of protectors.
• Air out the room daily, especially in winter. Open the window for 10 minutes in the morning.
• Do not fold or sit on the corners: it damages the internal structure.
• Clean the surface with a soft vacuum cleaner every 2-3 months.
• Combine with an appropriate bed base: a mattress on a deteriorated bed base lasts half the time. See Dreamura bed bases.

11. Frequently asked questions

How often should I change my mattress?

On average, every 8 to 10 years. If you wake up with back pain, notice visible sagging, or hear new noises in the springs, it's probably time to change.

Is a hard mattress better for the back?

Myth. The right mattress for your back is one that keeps your spine aligned — and that depends on your weight, position, and body type. For many people, medium firmness, not hard, is ideal.

Can I put a new mattress on an old bed frame?

It's not recommended. The bed frame or base transfers support to the mattress. If the bed base is worn, the new mattress will lose performance quickly.

How long does it take to get used to a new mattress?

Between 2 to 4 weeks. The body takes time to recalibrate posture and the mattress takes time to stabilize. Don't draw conclusions in the first few nights.

Is memory foam always hot?

Not always. Modern models with gel technologies, graphite, or cooling fabrics solve the problem. Always check the technical sheet.

Is a topper worth it?

Yes, in two situations: to soften an overly firm mattress, or to extend the life of a mattress that still works but is starting to lose surface comfort. See the Nemuke topper.

Conclusion

Choosing the right mattress is not a commercial act — it's a health decision. First define your profile (position, weight, thermal sensitivity, bed sharing), then map that to type, firmness, and size. Prioritize brands that offer a real at-home trial period and are transparent about what's inside the mattress.

If you want personalized help, you can speak with our Sleep Advisor, Ana Cristina, or take the recommendation quiz to start based on your profile.

Good sleep — and good investment.

---

See also

• The best mattress for lower back pain: 2026 guide
• Best sleeping position: side, back, or stomach
• The 4-7-8 method: how to fall asleep in 60 seconds
• Does sleep timing really matter?

Explore: All Dreamura mattresses · Bed bases · Pillows