Firmness
Type
Hybrid
Depth (cm)
36
Number of Layers
5
Trial Period (nights)
Warranty (years)
10
Price Range
£418 to £503
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 the spring system: 1000 full-size pocket springs handle the core support, while 2000 mini springs sit above them to fine-tune how the surface responds, which means support that adjusts to your shape rather than pushing back uniformly. Above that, 3cm of memory foam contours to your body to ease pressure at the hips and shoulders, and the cashmere knitted top adds a soft, breathable finish. At 36cm deep this is a substantial mattress, one that will need deep fitted sheets. From £418.90 for a Double with a 10-year guarantee, it sits in the mid-market and the spec goes a fair way to justifying that.
Key Features & what's inside
- Cashmere knitted top fabric. A cashmere knitted cover that feels soft and slightly luxurious from the moment you lie down. It is breathable too, which helps if you tend to run warm at night.
- High-density foam. A 3cm layer of high-density foam that gives a responsive surface, which means the mattress adjusts as you move rather than leaving you stuck in one spot.
- Memory foam. 3cm of memory foam that contours to your body and eases pressure points. This is the layer side sleepers will notice most around the hips and shoulders.
- Soft foam. A 2cm layer of softer foam adding extra cushioning between the comfort layers and the springs. It helps balance the firmer support below with a gentler surface feel.
- Pocket springs and mini springs. 1000 pocket springs provide targeted support across the mattress, with 2000 mini springs working alongside them. Because each spring moves independently, you get support where your body needs it and less disturbance from a partner's movement.
Layer details from sleepsoul.co.uk product page, September 2026.
Who's it NOT for?
There is no Single or Small Double, so solo sleepers with smaller rooms will need to look elsewhere. If you prefer a distinctly firm or distinctly soft feel, this medium tension may sit awkwardly in the middle for you. And at 36cm deep, standard fitted sheets are unlikely to fit.
SleepSoul Space Memory Pocket 3000 Boxtop Mattress in a Box
How firm is the SleepSoul Space Memory Pocket 3000 Boxtop?
SleepSoul rates it as medium. That generally suits back sleepers and most side sleepers, offering a balance of contouring memory foam and pocket spring support, although lightweight side sleepers may find any medium tension slightly firmer than expected.
How many springs does the SleepSoul Space Memory Pocket 3000 have?
3000 in total, made up of 1000 full-size pocket springs and 2000 mini springs. The pocket springs provide the core support, while the mini springs add a more responsive, adaptive feel near the surface.
How long does the SleepSoul Space Memory Pocket 3000 take to expand?
It arrives vacuum sealed in a box. SleepSoul says it expands to good condition within 2 hours and reaches its best condition after 24 hours, so you could sleep on it the same day, though waiting a full day is ideal.
What sizes is the SleepSoul Space Memory Pocket 3000 Boxtop available in?
UK Double, King and Super King, priced from £418 to £503. There is no Single option, so it is really designed for couples or anyone wanting a larger bed.
Does the SleepSoul Space Memory Pocket 3000 come with a guarantee?
Yes, SleepSoul offers a 10-year guarantee on this mattress, which gives reasonable long-term reassurance for a purchase at this price.
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