Sleepeezee Diamond Ortho Mattress
The Sleepeezee Diamond Ortho is a medium firm pocket sprung mattress with 1000 pocket springs housed in individual cotton pockets.
- Medium-firm support for back sleepers
- Turnable to wear more evenly
- Hypoallergenic fibre fillings
£279
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The Sleepeezee Diamond Ortho sits towards the affordable end for a pocket spring design. Inside you get 1000 pocket springs housed in individual cotton pockets, which means each spring moves independently and your partner's tossing is less likely to reach your side. Comfort comes from soft polyester fibre fillings under a breathable Belgian damask cover, and the whole thing is 24cm deep. It's double-sided, so you can flip it to even out wear. Sleepeezee is an NBF-approved manufacturer and a Royal Warrant holder, and the mattress carries a 10-year manufacturer's guarantee.
Mattress specifications
Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
24
Number of Layers
3
Trial Period (nights)
Warranty (years)
10
Price Range
£279 to £499
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
BS 7177
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
This one suits you if you want firmer, orthopaedic-style support without a premium price tag. The medium firm feel and independent pocket springs give steady support for back sleepers and heavier builds, although lightweight side sleepers may find it a little too firm at the shoulder. The turnable, double-sided construction is rarer these days and should help the mattress wear more evenly over time. Across verified owner reviews it holds a 4.7 rating from 269 reviewers on MattressNextDay. Yes, the fillings are simple polyester fibre rather than natural wool or latex, but that simplicity is exactly why it has an affordable starting price, and the hypoallergenic construction is a genuine plus for allergy sufferers.
Key features & layer details
Cover
A breathable Belgian damask fabric cover, which means air can move through the sleep surface rather than getting trapped. That helps you stay a little cooler through the night.
Comfort Fillings
Soft white fibre fillings made from 100% polyester. These give a gentle cushioned surface over the firmer springs beneath.
Support System
1000 pocket springs, each mounted in its own separate cotton pocket. Because the springs work completely independently, the mattress responds to your shape and reduces movement transferring across the bed.
Layer details from mattressnextday.co.uk product page, September 2026.
Best suited for?
Back sleepers
The medium firm feel and independent pocket springs give steady, even support under the spine, which suits anyone who sleeps mostly on their back.
Couples
Each of the 1000 pocket springs sits in its own cotton pocket, so your partner's tossing and turning is less likely to reach your side.
Heavier sleepers
Firmer support from independently working pocket springs helps the mattress hold its shape under more weight, rather than sinking away in the middle.
Allergy sufferers
The hypoallergenic construction and simple polyester fibre fillings make this a sensible pick if you want to avoid natural fillings like wool or latex.
Budget buyers
It sits towards the affordable end for a pocket spring design, giving you firm, orthopaedic-style support without paying a premium price.
If you sleep on your side and weigh less, the medium firm feel may press a little hard at the hips and shoulders. Anyone wanting deep, contouring memory foam should look elsewhere, as the fillings are simple polyester fibre. It also needs turning regularly, which won't suit everyone.
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.
Sleepeezee Diamond Ortho Mattress
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FAQ's
How firm is the Sleepeezee Diamond Ortho mattress?
It's rated medium firm. That means noticeable support with a modest layer of cushioning from the polyester fibre fillings, rather than a soft, sink-in feel. It suits back sleepers and those who prefer firmer support, although lighter side sleepers may find it slightly too firm.
Does the Sleepeezee Diamond Ortho have a guarantee?
Yes, the retailer listing states a 10-year manufacturer's guarantee from Sleepeezee. No sleep trial is mentioned on that listing, so check the returns policy with whichever retailer you buy from before ordering.
Can you flip the Sleepeezee Diamond Ortho mattress?
Yes. It has a double-sided, turnable construction with handles to make flipping easier. Turning it regularly helps the fillings settle evenly, which should keep the surface feeling consistent for longer.
What sizes does the Sleepeezee Diamond Ortho come in?
It's available in UK Single, Small Double, Double, King and Super King. The mattress is 24cm deep across all sizes.
Is the Sleepeezee Diamond Ortho good for allergy sufferers?
Owner reviews highlight its hypoallergenic properties as suitable for allergy sufferers and asthmatics. The fillings are 100% polyester fibre rather than natural materials like wool, which some people with allergies prefer to avoid.
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