SleepSoul Space Memory Pocket 3000 Boxtop Mattress in a Box
The SleepSoul Space Memory Pocket 3000 Boxtop is a 36cm deep hybrid mattress that arrives vacuum sealed in a box, combining 1000 pocket springs with 2000 mini springs beneath layers of memory foam and a cashmere knitted top.
- Support that adjusts to your shape
- Eases pressure at hips & shoulders
- 10-year guarantee
£418.90
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SleepSoul describes the Space Memory Pocket 3000 Boxtop as medium in firmness, which means it should suit back sleepers and most side sleepers without feeling overly soft. It comes in UK Double, King and Super King sizes, with a 10-year guarantee. There is no Single size, so it is aimed squarely at couples and larger bedrooms.
Mattress specifications
Firmness
Medium
Type
Hybrid
Depth (cm)
36
Number of Layers
5
Trial Period (nights)
Warranty (years)
10
Price Range
£418 to £503
Best Sleeping Position(s)
Side Sleeping
Back Sleeping
Combination 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 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. With a 10-year guarantee, it sits in the mid-market and the spec goes a fair way to justifying that.
Key features & layer details
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.
Best suited for?
Side sleepers
The 3cm memory foam layer contours to your body and eases pressure at the hips and shoulders, which is where side sleepers tend to feel it most.
Back sleepers
Medium firmness paired with 1000 pocket springs and 2000 mini springs gives support that adjusts to your shape without feeling overly soft.
Couples
Each spring moves independently, which means less disturbance from a partner's movement, and the mattress only comes in Double, King and Super King sizes.
Warm sleepers
The cashmere knitted top fabric is breathable, which helps if you tend to run warm at night.
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.
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 Space Memory Pocket 3000 Boxtop Mattress in a Box
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FAQ's
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. 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 a mid-range starting price.
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