SleepSoul Nebula Orthopaedic Pocket 600 Mattress in a Box
The SleepSoul Nebula Orthopaedic is a firm pocket sprung mattress in a box, available in UK Single through to King.
- Firm support for back & front sleepers
- Reduces roll-together for couples
- 10-year guarantee
£175.54
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Inside its 22cm depth, the SleepSoul Nebula Orthopaedic has 600 pocket springs, which means each spring moves independently to follow your shape rather than pulling you towards a partner in the night. A layer of soft foam and comfort quilting sits on top, so the firm feel is softened a little at the surface. It arrives vacuum packed, expands within 24 hours, and comes with a 10-year guarantee from SleepSoul. At an affordable starting price, it suits buyers who want firm orthopaedic-style support without spending a great deal.
Mattress specifications
Firmness
Firm
Type
Pocket Spring
Depth (cm)
22
Number of Layers
4
Trial Period (nights)
Warranty (years)
10
Price Range
£175 to £252
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Certifications
Assessed from SleepSoul'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 appeal here is straightforward firm support at a genuinely low price. SleepSoul describes the feel as firm, which tends to suit back and front sleepers or anyone who finds softer mattresses leave them sinking. The 600 pocket springs conform to your body's shape, supporting you where you need it most, and SleepSoul says they help prevent the roll-together effect that can plague cheaper open-coil designs. A non-slip base keeps the mattress steady on your bed frame, a small touch that matters on divans and slatted bases. The comfort layers are slim, but the 10-year guarantee is reassuring at an affordable starting price.
Key features & layer details
Top Layer
A layer of comfort quilting on the surface, which gives the firm mattress a slightly softer initial feel. It is what your skin actually touches, so it shapes that first impression when you lie down.
Soft Foam
1.5cm of soft foam sits beneath the quilting, providing deep comfort through consistent weight distribution. It is a thin layer, so expect cushioning rather than a plush, sink-in feel.
Springs
600 pocket springs conform to your body's shape, supporting you where you need it most. Because each spring is sewn into its own fabric pocket, SleepSoul says they help prevent the roll-together effect where couples drift into the middle.
Non Slip Fabric
An anti-slip base for additional stability, which means the mattress is less likely to shift around on slats or a divan. A simple feature, but useful in practice.
Layer details from sleepsoul.co.uk product page, September 2026.
Best suited for?
Back sleepers
The firm feel and 600 pocket springs that follow your shape give steady support under the lower body, so you stay level rather than sinking in.
Front sleepers
A firm surface with only a slim 1.5cm foam layer keeps hips from dipping too far, which suits anyone who dislikes sinking into softer mattresses.
Couples
Each spring sits in its own fabric pocket and moves independently, which SleepSoul says helps stop partners rolling together towards the middle of the bed.
Budget buyers
The copy describes it as affordable, and you still get 600 pocket springs, four layers and a 10-year guarantee for firm orthopaedic-style support.
Guest rooms
The non-slip base keeps the mattress steady on divans and slatted frames, and the vacuum-packed delivery makes it simple to set up for visitors.
This is a firm mattress with a slim 1.5cm foam comfort layer, so lightweight side sleepers may find it presses on hips and shoulders rather than letting them settle in. If you prefer a plush, cushioned surface, or you want deep foam contouring for pressure relief, look at softer or hybrid options instead.
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.
SleepSoul Nebula Orthopaedic Pocket 600 Mattress in a Box
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FAQ's
Is the SleepSoul Nebula Orthopaedic mattress firm?
Yes. SleepSoul rates it as firm, with 600 pocket springs providing the support and a thin layer of soft foam and comfort quilting on top. That combination suits back and front sleepers best, although lightweight side sleepers may find it a little too firm.
How long does the SleepSoul Nebula take to expand?
It arrives vacuum sealed in a box. SleepSoul says it expands to good condition within 2 hours and great condition within 24 hours, so you could sleep on it the same day, though leaving it a full day is ideal.
How deep is the SleepSoul Nebula Orthopaedic mattress?
It is 22cm deep. That is on the shallower side, which means most fitted sheets will fit easily, but it also reflects the fairly slim comfort layers above the springs.
Does the SleepSoul Nebula come with a guarantee?
Yes, SleepSoul lists a 10-year guarantee on its own site. That is a long span for a mattress at an affordable starting price, and gives some reassurance about how the springs and foam should hold up.
What sizes does the SleepSoul Nebula come in?
It is available in UK Single, Small Double, Double and King.
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