Firmness
Type
Open Coil Spring
Depth (cm)
21
Number of Layers
4
Trial Period (nights)
Warranty (years)
10
Price Range
£139 to £174
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.
This is a sensible pick if you want a straightforward, affordable mattress without wading through spec sheets. The Soft/Medium comfort rating suits side sleepers and lighter bodies who find firmer beds create pressure at the shoulder and hip. The 2cm soft foam layer distributes your weight consistently, which means fewer pressure points, while the open coils underneath keep the support even across the surface. A non-slip base stops it shifting on slatted frames, a small touch that matters more than it sounds. Yes, at 21cm it's a slim build, but the 10-year guarantee from SleepSoul gives it credibility that many budget options lack.
Key Features & what's inside
- Top Layer. A luxurious comfort quilting sits on top, which means a soft, cushioned surface the moment you lie down.
- Soft Foam. A 2cm layer of soft foam provides deep comfort through consistent weight distribution. In practice, that means your weight settles evenly rather than concentrating at the hips and shoulders.
- Springs. Traditional open coil springs provide even support across the whole mattress. Expect a slightly bouncier, more connected feel than pocket springs, so movement transfers a little more between partners.
- Non Slip Fabric. An anti-slip base adds stability, keeping the mattress in place on slatted or divan bases.
Layer details from sleepsoul.co.uk product page, September 2026.
Who's it NOT for?
If you prefer a firm surface, the Soft/Medium rating will likely feel too yielding, particularly for heavier bodies or committed front sleepers. Couples sensitive to a partner's movement may notice more motion transfer from the open coils than pocket springs would give. And there's no King or Super King size listed.
SleepSoul Air Mattress
View all mattresses
Is the SleepSoul Air mattress soft or firm?
SleepSoul rates it Soft/Medium, so it sits at the gentler end of the scale. That tends to suit side sleepers and lighter people, although anyone who prefers a firm, supportive feel may find it a little too soft.
How long does the SleepSoul Air take to expand?
It arrives vacuum-packed and boxed. SleepSoul says it expands to good condition within 2 hours and reaches its best after 24 hours, so it's usable the same day but ideally left overnight.
Does the SleepSoul Air come with a guarantee?
Yes, SleepSoul offers a 10-year guarantee, which is generous for a mattress starting at £139. No sleep trial is mentioned on the brand's site, so check returns terms with your retailer before buying.
What sizes does the SleepSoul Air come in?
It's available in UK Single, UK Small Double and UK Double, priced from £139 to £174. There's no King or Super King option listed, so larger beds will need a different model.
How deep is the SleepSoul Air mattress?
It measures 21cm deep, slimmer than many mid-range mattresses. That keeps standard fitted sheets easy to use, but expect a lower-profile feel than deeper hybrid designs.
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