Deeper balance — three latex layers designed for combination sleepers who want more

Naturalist Altum — Medium Firm

Name: Naturalist Altum — Medium Firm
Brand: Naturalist-Mattress
SKU: NM-HP-80S
Price: 1176.0 EUR
Availability: InStock

The Altum Medium Firm is designed for combination sleepers who want the balance of the Aura range but with a deeper comfort profile. Three natural latex layers create a more cushioned feel while the firmer top layer maintains structured support.

Like all Aura and Altum configurations, the layers are reversible — the firmer layer on top creates a medium feel; rearrange them for a softer configuration.

• Three latex layers — deeper profile than the Aura Medium Firm
• Designed for combination sleepers who want cushioning with structure
• Firmer top layer helps maintain spinal support across sleeping positions
• Reversible — reconfigure between Medium Firm and Soft at home

Choose your size: 80x200 cm 90x200 cm 160x200 cm 180x200 cm

Product variants

€1.176,00 EUR

~~€1.470,00 EUR~~ €1.176,00 EUR

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✔ 90-Night Risk-Free Trial

✔ 10-Year Warranty

✔ Free EU Delivery — No Hidden Costs

✔ Certified Natural Materials — No Foam, No Chemicals

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Combination sleepers

Adapts easily as you change positions during the night, maintaining comfort and support whether you sleep on your side, back, or a mix of both.

Back sleepers

Provides stable support to help keep the spine aligned, while the additional latex layer adds gentle cushioning for a more relaxed feel.

Medium weight sleepers

Balanced firmness prevents excessive sinking while the deeper latex construction adapts smoothly to the body’s natural curves.

Sleepers who prefer a balanced feel

A perfect middle ground between soft comfort and firm support - with a slightly deeper, more cushioned feel than a standard medium mattress.

If your mattress lacks balance, your sleep can suffer

The Full Latex Plus construction adapts to your body with a deeper, more responsive comfort profile - helping reduce pressure, improve alignment, and support uninterrupted sleep.

Poor spinal alignment

Without the right balance of support and comfort, the spine can fall out of alignment during sleep. A multi-layer latex structure distributes weight more evenly, helping maintain a natural, healthy posture.

Pressure without proper support

Too much firmness can create pressure points, while too little support can cause sinking. A balanced latex construction relieves pressure while still supporting the body evenly.

Restless sleep

Constant tossing and turning can be a sign of discomfort. A deeper, more adaptive surface reduces micro-adjustments, helping your body settle into more stable, uninterrupted sleep.

Overheating

Natural latex is breathable and does not trap heat like synthetic foams. Its open-cell structure allows airflow, helping maintain a comfortable sleep temperature throughout the night.

Sleep closer to nature

Create a calm and balanced sleep environment inspired by natural materials.

Organic cotton and wool cover

Breathable natural fabric that regulates temperature, manages moisture, and creates a clean, comfortable sleep surface.

7-zone firm natural latex comfort layer

A firmer latex layer placed on top to provide immediate support and maintain proper spinal alignment across the body.

Additional soft natural latex layer

A softer latex layer beneath adds deeper cushioning, allowing the body to relax while preventing pressure build-up.

Soft natural latex base layer

A second soft latex layer works from below to enhance comfort depth, creating a more balanced and adaptive feel without losing support.

Natural Dunlop Latex

Natural latex provides responsive pressure relief and adapts to the body's natural curves.

Organic Cotton and Wool

Breathable natural fibres help regulate temperature and manage moisture.

Breathable natural structure

Natural materials allow air to circulate through the mattress and help reduce heat build-up during sleep.

Naturalist firmness configurations

This mattress is currently configured as Soft.

Soft

Gentler pressure relief with deeper compression under load.

This setup allows the body to sink in more easily and creates a softer, more adaptive feel.

Recommended for:

Side sleepers
Combination sleepers
Light to medium body weight
Pressure-sensitive sleepers

Learn more

Medium

Current configuration

A balanced feel created by placing the firmer latex layer on top and the softer layer underneath.

This setup provides more stable support with a subtle underlying softness.

Recommended for:

Back sleepers
Combination sleepers
Medium body weight
Sleepers who want both comfort and support

Firm

Higher resistance with reduced compression.

This setup increases structural support and limits surface deformation.

Recommended for:

Back sleepers
Stomach sleepers
Higher body weight
Sleepers requiring reduced sink

Learn more

Dual Comfort

Different firmness levels on each side of the mattress.

Each side operates independently within the same structure.

Recommended for:

Couples with different preferences
Partners with different body weights
Shared beds requiring separate configurations

Learn more

Adjust comfort by rearranging the latex layers

The Full Latex Plus mattress is built with three interchangeable latex layers that can be easily rearranged at home.

In its default setup, the firmer latex layer is on top, creating a balanced medium feel with stable support and controlled comfort.

Swap the top layer with a softer one, and the mattress becomes more adaptive and pressure-relieving — moving into a Medium Soft feel.

Place the softest layers on top, and the mattress transforms into a deeper, more enveloping Soft version.

This gives you three distinct comfort options in one mattress, allowing you to adjust it over time without needing to replace it.

More usable space, without compromise

Sleep, move, and use your bed freely — with support that stays consistent across the entire surface.

Sleep all the way to the edge

No need to avoid the sides. The mattress feels just as supportive at the edge as it does in the center.

More space when sharing the bed

Stable support helps reduce rolling toward the middle. Both sleepers can comfortably use their full side of the mattress.

Low profile that fits your space

The slimmer design takes up less visual and physical space. Ideal for smaller rooms, minimalist setups, or lower bed frames.

Material & Construction Details

Top layer: Firm latex (~85 kg/m³)

Function: structural support

Bottom layer: Soft latex (~70 kg/m³)

Function: pressure relief

Configuration: reversible (Medium ↔ Soft)

Manufacturing method: variable pinhole pattern

Zoning principle:
Smaller perforations → higher density → higher resistance
Larger perforations → lower density → lower resistance

Zone distribution:
Head / Neck → medium resistance
Shoulders → lower resistance
Upper back → medium resistance
Lumbar → higher resistance
Pelvic → controlled resistance
Knee → transition zone
Lower legs / feet → lower resistance

Zone transition: continuous (non-stepped)

Cover: cotton / wool
Certification: GOTS-certified (supplier level)

Latex: natural Dunlop latex
Certification: GOLS-certified (supplier level)

Coconut fibre: used in hybrid models

Horsehair: used in selected models

Natural temperature regulation

Breathable natural materials help maintain a comfortable sleep temperature throughout the night.

Heat doesn’t build up

Air moves freely through the mattress instead of being trapped around your body, helping you maintain a more comfortable sleep temperature.

Less humidity during the night

Natural fibres absorb and release moisture, reducing that warm, damp feeling and keeping your sleep surface more balanced.

Always fresh and breathable

The internal structure allows continuous airflow, so the mattress stays light, airy, and comfortable throughout the night.

Modular delivery system

Delivered in manageable boxes for easier transport and setup.

Easier to transport

The Naturalist mattress is delivered in several manageable boxes instead of one large package, making transportation much easier.

Easier to carry upstairs

Smaller boxes are easier to carry through narrow staircases, elevators and hallways.

Simple assembly

The mattress layers are assembled easily at home, creating the full mattress structure in just a few steps.

Assembly instructions are included with every mattress.

	Naturalist Hybrid	Naturalist Full Latex	Naturalist Full Latex Plus	Naturalist Horsehair
Best sleeping position	All positions	Side & back	Back & stomach	All positions
Pressure relief	Excellent	Superior	Good	Excellent
Spinal support	Excellent	Good	Superior	Excellent
Temperature regulation	Good	Excellent	Good	Superior
Motion isolation	Good	Excellent	Good	Excellent
Edge support	Superior	Good	Excellent	Excellent
Breathability	Excellent	Superior	Good	Superior
Natural materials	100% natural components	100% natural components	100% natural components	100% natural components
Durability	15+ years	20+ years	15+ years	25+ years
Ideal sleeper weight	All weights	Light to medium	All weights	All weights

Sleep on it for 90 nights

Try your Naturalist mattress at home and take time to decide if it's right for you.

90-night sleep trial

Sleep on your Naturalist mattress at home for up to 90 nights and see how it feels over time.

Adjustable comfort

The modular construction allows small comfort adjustments if the mattress feels too firm.

10-year warranty

Naturalist mattresses are built using durable natural materials and are covered by a 10-year warranty.

Free EU delivery

Your mattress is delivered across the EU in modular boxes that are easier to transport and assemble.

Made close to nature

Naturalist mattresses are produced in a factory surrounded by forests and lakes using renewable energy and natural materials.

A mattress inspired by nature

Naturalist mattresses are created in a peaceful natural environment where forests, water and fresh air are part of everyday life. This connection to nature influences how we design our mattresses and the materials we choose.

Responsible production

Our factory uses renewable energy from rooftop solar panels, helping reduce environmental impact while producing durable natural sleep products.

Crafted with care

Each Naturalist mattress is assembled by experienced craftsmen and designed to provide long-lasting comfort using certified natural materials.

Designed for better sleep. Created with respect for nature.

Naturalist Altum — Medium Firm