Firmness
Type
Memory Foam
Depth (cm)
11
Number of Layers
3
Trial Period (nights)
Warranty (years)
10
Price Range
£125 to £162
Best Sleeping Position(s)
Certifications
Assessed from SleepSoul's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
The main draw here is price. From £125, the Nimbus is one of the cheaper routes to a memory foam feel, and the 10-year guarantee from SleepSoul adds a layer of confidence you might not expect at this level. The medium feel should suit most sleeping positions, although the shallow 10.5cm profile means it works best where a slim mattress is actually an advantage: bunk beds, cabin beds or an occasional guest bed. It arrives vacuum-packed in a box, and SleepSoul asks that you give it 48 hours to return to its original size before sleeping on it. It is a simple design, but at this price, simplicity is fair.
Key Features & what's inside
- Luxurious comfort quilting. A quilted top layer that adds a soft, cushioned surface where your body first meets the mattress. It gives the sleeping surface a slightly plumper feel than a plain cover would.
- Memory Foam. A 1cm layer of memory foam that acts as a transition layer, designed for what SleepSoul calls the perfect sink with minimised movement. Being thin, it offers a gentle hint of contouring rather than the deep hug of thicker memory foam mattresses.
- Foam. A 10cm foam base that provides deep comfort through consistent weight distribution. This layer does most of the supportive work, spreading your weight evenly across the mattress.
Layer details from sleepsoul.co.uk product page, September 2026.
Who's it NOT for?
At 10.5cm deep, this is a slim mattress, so heavier adults or anyone wanting a plush, deep-sinking feel should look elsewhere. If you love pronounced memory foam contouring, the 1cm layer here will feel too subtle. It is best treated as a guest, bunk or budget option rather than a long-term main mattress.
SleepSoul Nimbus Mattress
How deep is the SleepSoul Nimbus mattress?
The Nimbus is 10.5cm deep, which is slimmer than most standard mattresses. That makes it a good fit for bunk beds, cabin beds and guest rooms, where a lower profile is often safer and more practical, but a less obvious choice as an everyday mattress for adults.
Is the SleepSoul Nimbus firm or soft?
SleepSoul describes the Nimbus as having a medium feel. The quilted cover and thin memory foam layer give a little softness at the surface, while the 10cm foam base underneath keeps things supportive rather than sinky.
Does the SleepSoul Nimbus come with a guarantee?
Yes, SleepSoul lists a 10-year guarantee for the Nimbus, which is generous for a mattress starting at £125.
How is the SleepSoul Nimbus delivered?
It arrives vacuum-packed and boxed, which makes it easier to carry upstairs and into smaller rooms. SleepSoul advises allowing 48 hours for it to return to its original size before you sleep on it.
What sizes does the SleepSoul Nimbus come in?
The Nimbus is available in UK Single and UK Double, priced from £125 to £162. There is no small double, king or super king option, so couples wanting more space will need to consider a different model.
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