SleepSoul Space 4000 Orthopaedic Mattress
The SleepSoul Space 4000 Orthopaedic Mattress is a pocket spring design with 4,000 springs, which means each spring can respond to your body independently rather than the whole surface moving as one.
- Firm feel for back & front sleepers
- CoolGel foam helps you sleep cooler
- Non-slip base stays put on frames
£589
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The SleepSoul Space 4000 is sold as an orthopaedic model, which usually points towards a firmer, more supportive feel, though SleepSoul doesn't publish a firmness statement for it. It comes in UK Double, King and Super King. If you buy through Mattressman, the retailer lists a 60-night trial and free next day delivery. Details on the internal layers are thin, so if you like to know exactly what you're sleeping on, that's a gap to weigh up.
Mattress specifications
Firmness
Firm
Type
Pocket Spring
Depth (cm)
Number of Layers
6
Trial Period (nights)
60
Warranty (years)
Price Range
£589 to £639
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Certifications
Assessed from the specification published by Mattress Man, 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 count. With 4,000 pocket springs, you get finer contouring than a basic sprung mattress can manage, which means better pressure relief along your hips and shoulders and less disturbance when a partner moves. The orthopaedic label suggests it's aimed at people who want firmer support, perhaps for a bad back or simply a preference for a sturdier surface. The lack of published layer details is frustrating for a considered purchase. But that spring count comes in at a fairly sensible price, and buying through Mattressman adds a 60-night trial so you can change your mind if the feel isn't right.
Key features & layer details
Soft cover
A knitted cover, which another page describes as Tencel. It's the surface you lie on, so it gives the mattress a smooth, soft first touch.
Memory foam
A 1cm layer of memory foam. It's thin, so it adds a little cushioning under your body without taking away the firm feel.
CoolGel foam
A 3.5cm layer of CoolGel foam. It's the thickest foam layer here and adds comfort over the springs, with the gel aimed at keeping the surface from feeling too warm.
Mini pocket springs
A layer of 2000 mini pocket springs. Each one moves on its own, so the surface can follow your shape more closely under the foam.
Support pocket springs
A layer of 2000 support pocket springs that forms the core. It carries your weight and keeps you held level, which gives the mattress its firm, supportive base.
Non-slip base fabric
A non-slip underside made for bedframes and ottomans. It helps the mattress stay where you put it, so it doesn't creep around on the base.
Layer details from mattressman.co.uk and mattressonline.co.uk product pages, October 2026.
Best suited for?
Couples
With 4,000 pocket springs working independently, you get less disturbance when a partner moves, and the Double, King and Super King sizes give two people room.
Back sleepers
The orthopaedic label points towards a firmer, more supportive surface, which suits anyone who likes to stay level and well held when lying on their back.
Front sleepers
A firmer orthopaedic feel helps keep your hips from sinking too far, while the pocket springs still contour enough to ease pressure under your body.
Heavier sleepers
The sturdier orthopaedic feel and the high count of 4,000 pocket springs should give more resistance under weight than a basic sprung mattress would.
Orthopaedic mattresses generally sit on the firmer side, so lightweight side sleepers may find it a little too solid for comfortable pressure relief. There's no Single size listed, which rules it out for children's rooms or narrow guest beds. And if you want full transparency on materials and construction, the published information here is sparse.
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 4000 Orthopaedic Mattress
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FAQ's
How many springs does the SleepSoul Space 4000 have?
It contains 4,000 pocket springs. Each spring is sewn into its own fabric pocket and moves independently, which means the mattress can follow the shape of your body more closely and limit motion transfer between partners.
How much does the SleepSoul Space 4000 cost?
It depends on the size you choose, and the price table on this page shows the current price for each size. It comes in UK Double, King and Super King.
Does the SleepSoul Space 4000 come with a sleep trial?
Mattressman lists a 60-night trial on this mattress. That trial is the retailer's own offer rather than a manufacturer guarantee, so if you buy elsewhere the terms may differ. Check with your chosen retailer before ordering.
How quickly can the SleepSoul Space 4000 be delivered?
Mattressman offers free next day delivery on this mattress, with a handling time of 0 to 1 day and transit time of 1 to 3 days. These are the retailer's own delivery terms, so they apply when buying through Mattressman specifically.
Is the SleepSoul Space 4000 firm?
Neither the brand nor the retailer publishes a firmness rating for this mattress. It's marketed as orthopaedic, a term that typically signals a firmer, more supportive feel, but without an official statement we can't confirm exactly where it sits. If firmness matters to you, it's worth checking with the retailer directly.
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