Coolflex Lux Ortho Pocket Mattress
The Coolflex Lux Ortho Pocket is an extra firm hybrid mattress, which means it pairs pocket springs with foam for a supportive, no-sink feel.
- Genuinely firm feel
- Minimises partner disturbance
- Pressure relief without deep sink
£199
Get the lowest price we've found
At 24cm deep, the Coolflex Lux Ortho Pocket sits at the affordable end of the market, with sizes running from UK Single up to UK Super King. It comes with a 5-year guarantee and free next day delivery to almost everywhere across mainland UK, although some addresses may incur a small fee. If you like a properly firm bed, or sleep mostly on your back or front, it deserves a look. Lightweight side sleepers may find it a little too unyielding.
Mattress specifications
Firmness
Extra Firm
Type
Hybrid
Depth (cm)
24
Number of Layers
3
Trial Period (nights)
Warranty (years)
5
Price Range
£199 to £349
Best Sleeping Position(s)
Stomach Sleeping
Certifications
BS 7177
Assessed from Coolflex's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
The main draw here is genuine firmness at a modest price. The pocket springs work independently, which means the mattress adapts to your weight and movement rather than moving as one slab, so a restless partner is less likely to disturb you. Above the springs, Reflex Foam contours to your shape for pressure relief without the deep sink of an all-foam bed. The knitted cover is breathable, helpful if you tend to run warm at night. It is also hypoallergenic, vegan friendly and certified fire resistant to the BS7177: 2008 standard for domestic use. Yes, the 5-year guarantee is shorter than some brands offer, but at an affordable starting price the value case is strong.
Key features & layer details
Knitted Cover
A soft knitted cover that breathes well, which means heat can escape rather than build up around you. It helps keep you at an even temperature all night.
Reflex Foam
A soft layer of Reflex Foam that contours to the shape of your body, which means personalised support and pressure relief where you need it. It gives a comfortable surface without undermining the firm feel beneath.
Pocket Springs
Individual pocket springs work independently, reacting to changes in your weight and movement. In practice that means responsive support at your pressure points and less motion transfer across the bed.
Layer details from mattressnextday.co.uk product page, September 2026.
Best suited for?
Back sleepers
Extra firm support from the pocket springs keeps the body level, while the Reflex Foam layer above adds light pressure relief without a deep sink.
Front sleepers
A properly firm surface over independent pocket springs stops the hips dropping too far, so the body stays flatter than it would on a soft bed.
Couples
Pocket springs work independently and react to weight and movement, which means a restless partner is less likely to disturb you.
Warm sleepers
The breathable knitted cover lets heat escape rather than build up around you, which helps you stay at an even temperature overnight.
Budget buyers
Sitting at the affordable end of the market, it delivers genuine firmness and a three-layer build, with a strong value case behind it.
This is an extra firm mattress, so it is not the one for lightweight sleepers or dedicated side sleepers who need their shoulder and hip to sink in. If you prefer a soft, cradling, hug-you-in feel, an all-foam or medium mattress will suit you far better.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Coolflex Lux Ortho Pocket Mattress
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FAQ's
How firm is the Coolflex Lux Ortho Pocket mattress?
It is rated extra firm, the firmest end of the scale. Expect a supportive, flat sleeping surface with very little sink, which tends to suit back and front sleepers and heavier builds rather than lightweight side sleepers.
How deep is the Coolflex Lux Ortho Pocket mattress?
It is 24cm deep, a fairly standard depth that should fit most fitted sheets without any trouble.
What sizes does the Coolflex Lux Ortho Pocket come in?
Five sizes: UK Single, UK Small Double, UK Double, UK King and UK Super King.
Does the Coolflex Lux Ortho Pocket have a guarantee?
Yes, it comes with a 5-year guarantee. That is shorter than some brands offer, but reasonable for a mattress with an affordable starting price.
Is the Coolflex Lux Ortho Pocket good for allergy sufferers?
It is certified hypoallergenic, which makes it a sensible choice if you are prone to allergies. It is also vegan friendly and meets the BS7177: 2008 fire resistance standard for domestic use.
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