What is the difference between a foam and a memory foam mattress?

Standard foam (polyurethane or HR) provides elastic, bouncy support. Memory foam (viscoelastic) adapts to body heat and weight for gradual envelopment. Memory foam offers better pressure point relief but can feel more 'sunk in' than standard foam.

Does memory foam retain heat?

Yes, this is its main drawback. Viscoelastic foam softens with body heat, which can create an overheating sensation. Manufacturers have developed solutions: cooling gel, perforations, thermoregulating fiber covers (Tencel, bamboo). If you're a hot sleeper, look for these technologies or consider a hybrid mattress.

What density for a foam mattress?

For daily use, choose a density of at least 30-35 kg/m³ for the base foam and 50-80 kg/m³ for the memory foam layer. Insufficient density leads to rapid sagging (sometimes in under 2 years). Quality brands like Tempur use densities > 85 kg/m³.

Is a memory foam mattress good for your back?

Generally yes. The body-adaptive properties help keep the spine aligned, which reduces lower back tension. However, a mattress that's too soft can worsen back pain. People with chronic back pain should choose a medium-firm memory foam mattress (firmness 6-7/10).

How long does a foam mattress last?

A basic foam mattress lasts 5-7 years. A high-quality memory foam model can last 8-12 years. Lifespan depends on density, usage, and maintenance (regular rotation, protective cover).

Foam and Memory Foam Mattress: Complete Guide...

Foam and memory foam mattresses dominate the bedding market in 2026. Nearly 70% of mattresses sold online incorporate one or more layers of polyurethane foam, HR (High Resilience) foam, or viscoelastic foam. Their success comes down to an attractive price-to-quality ratio, a wide range of firmness levels, and technologies that improve every year to address their historical drawbacks — particularly heat retention.

This complete guide helps you understand these technologies, distinguish standard foam from memory foam, and choose the model suited to your body type, budget, and sleep habits.

What is polyurethane foam and how to judge its quality?

Quick answer: Polyurethane (PU) foam is the most common material in mattresses. Its quality is measured by its density in kg/m³: under 25 kg/m³ for temporary use (2-3 years), 25-30 kg/m³ for entry-level (3-5 years), 30-40 kg/m³ for mid-range (5-7 years), and over 40 kg/m³ for high-end (7-10 years).

How does PU foam work?

Polyurethane (PU) foam is the most common material in mattresses. It is made from polyols and isocyanates that, when mixed and expanded, form a flexible cellular structure. The density of this foam — expressed in kg/m³ — determines its firmness and durability.

Density	Use	Estimated durability
< 25 kg/m³	Guest mattress, sofa beds	2-3 years
25-30 kg/m³	Entry-level	3-5 years
30-40 kg/m³	Mid-range	5-7 years
> 40 kg/m³	High-end	7-10 years

HR foam (High Resilience): the evolution

HR foam is a superior-quality polyurethane with increased elasticity. Unlike basic foam that sags and slowly regains its shape, HR bounces back quickly. It provides better dynamic support and superior durability. Tediber, Emma, and Bultex mattresses primarily use multi-layer HR foams.

Advantages of HR foam:

Elastic bounce: makes nighttime movement easier
Durability: better resists repeated compression
Contained price: cheaper than latex or pocket springs
Lightweight: easier to handle than a spring mattress

Disadvantages:

Less enveloping comfort than memory foam
Limited lifespan compared to latex (7-10 years vs 15-20 years)
Potential heat retention depending on quality

What is memory foam and why is it different from standard foam?

Quick answer: Memory foam (viscoelastic) is a temperature-sensitive material that adapts to body heat and weight, creating a unique enveloping effect. Unlike PU foam which bounces back immediately, memory foam slowly returns to its shape, offering better pressure point relief and optimal spinal alignment.

Origin and how it works

Memory foam was originally developed by NASA in the 1960s to cushion gravitational forces on astronauts. This viscoelastic material is temperature-sensitive: it softens under the effect of body heat and molds to the exact shape of the body.

Unlike standard foam which pushes back against the body (elastic reaction), memory foam "sinks in" gradually and distributes pressure evenly. This is why it's particularly recommended for:

Side sleepers (relieves shoulders and hips)
People suffering from joint pain
Couples (excellent motion isolation)

The different generations of memory foam

First generation (1990s-2000s): Basic memory foam, very enveloping but hot and slow to regain its shape. Tempur popularized this technology.

Second generation (2000-2015): Addition of cooling gel and perforations to improve breathability. Responsiveness improved.

Third generation (2015-present): Open-cell foams, conductive graphite, copper or bamboo charcoal infusions. These innovations significantly reduce heat retention while preserving the benefits of envelopment.

Reference brands

Tempur: The premium benchmark with the original TEMPUR foam. High price (999-2499 €) but unmatched comfort and durability.
Emma: Accessible memory foam (299-799 €) with HRX technology. Excellent value for money.
Hypnia: Premium memory foam at a contained price (249-649 €) with Cool Comfort technology.
Simba: Hybrid approach combining micro-springs and memory foam for a freshness/comfort balance.

How to choose between standard foam and memory foam?

Quick answer: Choose standard foam (HR) if you prefer dynamic support, sleep hot, or have a limited budget. Choose memory foam if you suffer from joint pain, sleep on your side, or want enveloping comfort. For a compromise, hybrid mattresses combine both technologies.

Based on your sleep position

Back sleeper: Both technologies work well. Prefer medium firmness (5-6/10) to maintain the natural curve of your spine. Memory foam offers a slight advantage for lumbar support.

Side sleeper: Memory foam is ideal. It relieves pressure on the shoulders and hips that bear the body's weight. A top layer of at least 5 cm of memory foam is recommended.

Stomach sleeper: Standard or HR foam is often preferable. Memory foam can create excessive sinking at the pelvis, misaligning the spine. Choose a firm mattress (7-8/10).

Based on your weight

Weight	Standard/HR foam	Memory foam
< 60 kg	Medium-soft (4-5/10)	Medium (5-6/10)
60-90 kg	Medium-firm (6-7/10)	Medium-firm (6-7/10)
> 90 kg	Firm (7-8/10)	Firm (7-8/10), thickness ≥ 25 cm

Overweight individuals should prioritize high density (> 40 kg/m³ for the base, > 60 kg/m³ for memory foam) to prevent premature sagging.

Based on your budget

< 300 €: Basic polyurethane foam or first-generation memory foam. Watch out for durability.
300-600 €: Ideal segment for quality memory foam (Hypnia, Emma Original). Good comfort/durability balance.
600-1000 €: Multi-layer with advanced technologies (Tediber, Emma Premium, Simba).
> 1000 €: Premium memory foam (Tempur) or high-end hybrid mattresses.

What technical criteria to check before buying a foam mattress?

Quick answer: Check three essential criteria: layer composition (density of each layer in kg/m³), health certification (OEKO-TEX Standard 100 or CertiPUR guarantee the absence of harmful substances), and the home trial period (minimum 30 nights, ideally 100 nights to confirm your body has adapted).

Layer composition

A good foam or memory foam mattress typically consists of:

Comfort layer (5-8 cm): Memory foam or soft HR foam on the surface
Transition layer (5-10 cm): Medium-density HR foam for weight distribution
Support layer (10-15 cm): High-density HR foam (> 35 kg/m³) for durability

Be wary of mattresses with "10 cm of memory foam": such thickness is unnecessary and can cause excessive sinking. 3-5 cm of quality memory foam is sufficient.

OEKO-TEX Standard 100 certification

This certification guarantees the absence of harmful substances in textiles and foams. It's essential to avoid VOC (volatile organic compound) emissions that can cause respiratory or skin irritation. All serious brands (Emma, Tediber, Tempur, Hypnia) carry it.

Home trial

One of the great advantages of bed-in-a-box mattresses is the trial period:

Emma: 100 nights
Tediber: 100 nights
Simba: 200 nights (a record)
Tempur: 100 nights
Hypnia: 60 nights

This period is crucial because adapting to a memory foam mattress can take 2 to 4 weeks. Your body needs to get used to the new enveloping sensation.

How to maintain a foam or memory foam mattress?

Quick answer: To maintain your foam mattress, rotate it head-to-toe every 3-6 months (flip it only if it's reversible and has no zones), air it regularly by opening windows, always use a waterproof and washable protective cover, and avoid harsh cleaning products that can degrade the foam.

Rotation and flipping

Unlike spring mattresses, most foam mattresses are not reversible (the comfort layer is only on top). However, it's recommended to rotate the mattress 180° every 3-6 months to distribute wear evenly.

Airing

Foam retains moisture. Air out your mattress daily by pulling back the duvet in the morning. A breathable anti-dust mite cover is also recommended.

Protective cover

A waterproof mattress protector extends the life of the mattress by preventing stains and sweat from penetrating the foam. Choose a breathable model to avoid increasing heat retention.

Final verdict: should you choose a foam or memory foam mattress?

Quick answer: HR foam mattresses offer the best value for money for the majority of sleepers, with good durability and a wide range of firmness levels. Memory foam is superior for pain relief and enveloping comfort, but retains more heat. For 80% of buyers, a hybrid or multi-layer HR mattress is the most balanced and durable choice.

Foam and memory foam mattresses offer the best value for money for the majority of sleepers. Memory foam is ideal for side sleepers, people sensitive to pressure points, and those seeking enveloping comfort. HR foam is better suited for stomach sleepers, heavier individuals, and those who prefer firmer, bouncier support.

For a quality first purchase, the Emma Original remains our benchmark in accessible memory foam, while the Tediber excels in multi-zone HR foam. If budget allows, the Tempur Original offers the most accomplished memory foam experience on the market. Don't hesitate to check our detailed tests to compare the feel of each model based on your body type.