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Comfort Fillings

Memory Foam

Moulds to your body, giving orthopaedic support and superb comfort.

Support System

TEMPUR® Material

Billions of ultra-sensitive open cells existing between a solid and fluid state, adapting to changes in your movement and warmth.

Firmness

Firm

Good for people who sleep on their front or back.

Emma Sharp

Education & Advocacy Manager , TEMPUR®

What the Sleep Expert thinks...

"The ONE Firm proves why genuine TEMPUR Material still leads the field: billions of open cells stiffen under hips and shoulders yet cushion everywhere else, keeping front and back sleepers perfectly aligned, cool and undisturbed all night—performance we’ve verified after months of testing."

Description

The TEMPUR® One Firm Mattress is the embodiment of TEMPUR®’s scientific advancements. An open cell structure responds to your body’s weight and warmth, constantly adapting to your unique needs, softening the mattress at your heaviest pressure points.

Technology derived from space

Firm visco-elastic cells provide you with full body support and pressure relief as you sleep. Adapting to your individual needs, these billions of spherical open cells contour to your body, continuously rearranging to support your body as you body changes in temperature, weight and movement.

These cells ensure the mattress gets slightly softer where your heaviest pressure points arise, so you feel extra support exactly where you need it.

The TEMPUR® ONE Firm Mattress contours to your unique body shape, without you feeling completely sunk in. You’ll feel supported, comfortable and tailored to with TEMPUR® Support Material offering you a firm and reliable sleep surface.

Derived from the material NASA uses to cushion astronauts in space, TEMPUR® Support Material ensures complete adaptive comfort as well as motion absorption. This means you won’t be disturbed by a partner in the night, with the TEMPUR® ONE Firm Mattress adapting uniquely to your individual needs.

A cool, refreshing night’s sleep

While regular memory foam is known for its heat retention, the TEMPUR® ONE Firm Mattress offers enhanced ventilation, encouraging air circulation throughout the mattress. Not only does this keep you cool and refreshed throughout the night, but creates a healthier sleeping environment, too.

An easily removable mattress cover allows you to clean away any spills quickly, increasing the TEMPUR® ONE Firm Mattress’ lifespan. A true staple of Danish design and honest craftsmanship, this mattress comes with a ten year manufacturer’s guarantee.

1278061-

Features

Memory Foam

Originally designed by NASA, Memory Foam moulds to your body, giving orthopaedic support and superb comfort. It also helps to overcome the pressure points of the body.

Authentic TEMPUR® Material

Billions of ultra-sensitive open cells existing between a solid and fluid state, adapting to changes in your movement and warmth.

20cm Depth

This mattress is approximately 20cm deep.

Removable Cover

To aid with hygiene, this product has a zipped cover that can be removed for washing.

Knitted Cover

This luxurious soft knitted cover is breathable, which helps to keep the sleeper at an even temperature all night long.

Orthopaedic Support

Designed to offer a firmer sleep surface, providing targeted support for your back and joints.

No Need To Turn

A single-sided mattress which does not need to be turned/flipped. One-sided mattresses should, however, be rotated head to toe regularly.

No Roll Together

Individual personal sleeping zones mean that you won't be disturbed if your partner rolls or moves, as you won't feel their motion. There's also no tendency to roll towards the middle of the mattress.

Pressure Relieving

This type of mattress gives maximum pressure relief, allowing your body weight to spread across it evenly. This ultimately means less tossing and turning throughout the night and a more relaxing and restful sleep.

Hypoallergenic

Being hypoallergenic, this is the perfect item for allergy sufferers - or anyone looking for a healthy night's sleep.

Vegan Friendly

This product is made from materials that are 100% free from animal by-products.

Fire Resistant - Low Hazard

This product conforms to the BS7177: 2008 standard for domestic use (low hazard) - ideal for use at home.

TEMPUR® Quality

Sixty-seven quality checks are carried out by sleep scientists to ensure absolute perfection

Certified Space Technology®

Developed from material first used by NASA, TEMPUR® Material is certified by the Space Foundation.

Additional features

Made in DenmarkManufactured in a country renowned for its creative design and dedicated craftsmanship.

Benefits

Perfect for back sleepers, but excellent support no matter what position you sleep in
Motion absorption prevents a disrupted sleep
Reactive support to changes in weight and temperature
No need to flip or turn
10 year manufacturer’s guarantee
Drift into a re-energising sleep
Billions of visco-elastic open cells arrange themselves to support you
Antimicrobial zip cover is easily removable and washable
Enhanced breathability prevents heat retention

Awards

Top 10 Recommended Mattress

Over 50 years experience in the world of mattresses, MattressNextDay have seen, researched and distributed enough of them to be able to spot the best ones. By selecting ten of their best mattresses to recommend to you, mattresses with a Top Recommended Award are not only some of the most popular with customers, but personally endorsed by the people who know the most.

Expert Approved

You've got the best price

As Online Bed Retailer of the Year 2025 - 2026, you can trust us to get you the best price. With our fast delivery and exceptional service, you won't find better elsewhere.

TEMPUR® ONE Firm Mattress

4.9 out of 5

5 Star (13)

4 Star (0)

3 Star (1)

2 Star (0)

1 Star (0)

Authentic TEMPUR® Material

Memory Foam

20cm Depth

Removable Cover

Firmness: Firm

from £

Size

Double 4'6" x 6'3"

£1089

Only 1 left

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Description & Features