SleepSoul Space 4000 Orthopaedic Double 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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SleepSoul Space 4000 Orthopaedic Mattress
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Mattress details
Mattress
SleepSoul Space 4000 Orthopaedic Mattress
Size
Firmness
Firm
Construction
Pocket Spring
Orthopaedic
Depth (cm)
Layers
6
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.
Key benefits
- Shared space that suits ordinary rooms: At 135 x 190cm, the UK double fits a typical master bedroom or first flat and still leaves space for a wardrobe and a chest of drawers.
- Independent springs for closer sleeping: With 67.5cm each, couples sleep nearer together than on larger sizes, so individually pocketed springs help keep one person's movement from travelling across to the other.
- Room for bedside tables either side: We suggest at least 2.6m x 2.8m for a UK double, with around 3m x 3m the comfortable norm if you want a table and lamp on both sides.
- Easy to dress: Double sheets are sold almost everywhere, and a 200 x 200cm double duvet covers the UK double without any hunting around for specialist bedding.
- A generous bed for one: If you sleep alone, the UK double gives you space to sprawl, with a spare corner for a dog or cat that insists on joining you.
This size suits you if...
You share the bed every night in a standard UK bedroom and want to keep bedside tables on both sides, or you sleep alone and like room to spread out with a pet tucked in at the foot.
Consider another size if...
You and your partner already feel cramped side by side, or one of you finds 190cm too short. We'd recommend the UK king instead, and suggest at least 2.7m x 2.9m for it.
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FAQ's
How much space does each person get on the SleepSoul Space 4000 UK double?
Two people sharing the UK double get 67.5cm each. That's 7.5cm less each than the UK king, which gives 75cm per person, and 22.5cm less each than the UK super king at 90cm. For most couples who sleep fairly still, 67.5cm is workable, although restless sleepers may notice the difference.
Can I fit bedside tables either side of a SleepSoul Space 4000 double?
Usually, yes. We suggest a room of at least 2.6m x 2.8m for a UK double, and around 3m x 3m is the comfortable norm if you want a table on each side with space to walk round. In a tighter second bedroom, one table against the wall is the more realistic layout.
What size is the SleepSoul Space 4000 UK double in feet and inches?
The UK double measures 4ft 6in x 6ft 3in, which is 135 x 190cm. It's the same length as the UK small double and UK single, but 10cm shorter than the UK king and UK super king, so taller sleepers should check that 190cm leaves enough length for them.
Is the SleepSoul Space 4000 double long enough for tall couples?
The UK double is 190cm long. If either of you finds your feet reaching the end of a standard bed, the UK king adds 10cm of length as well as 15cm of width. That extra length is often the deciding factor for taller couples rather than the width.
Do 4,000 pocket springs help with partner disturbance on a UK double?
They should help. On a UK double you sleep closer together than on a UK king or UK super king, so movement has less distance to fade out. Pocket springs respond independently rather than moving as one surface, which means a partner shifting on their side is less likely to be felt on yours.