SleepSoul Space Memory Pocket 3000 Boxtop Super King 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
£502.55
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SleepSoul Space Memory Pocket 3000 Boxtop Mattress in a Box
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Mattress details
Mattress
SleepSoul Space Memory Pocket 3000 Boxtop Mattress in a Box
Size
Firmness
Medium
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
36
Layers
5
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.
Key benefits
- Room for an extra body: At 30cm wider than the UK king, the UK super king leaves space for a child who climbs in at night without either adult ending up on the edge.
- Distance from a restless partner: With 90cm each and independently moving pocket springs underneath, a partner's tossing and turning has much further to travel before it reaches you.
- Space for pets as a habit: If a large dog sleeps on the bed every night, 6ft of width means sharing the mattress rather than surrendering your half of it.
- Full length for taller sleepers: The UK super king is 200cm long, matching the UK king and 10cm longer than the UK double, so tall sleepers can stretch out fully.
- Arrives rolled for tricky landings: Because it comes vacuum sealed in a box, a mattress this wide is far easier to carry around a tight landing turn than a flat one would be.
This size suits you if...
You regularly share the bed with a child or a large dog, or your partner moves so much that a UK king still feels crowded, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is smaller than our suggested 3m x 2.9m, or you mostly sleep alone. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
Is the SleepSoul Space Memory Pocket 3000 UK super king big enough for two adults and a child?
For occasional night visits, yes. Each adult starts with 90cm of width, so a small child can fit in the middle without anyone being pushed to the edge. For a child who sleeps in the bed every night, the medium feel and independent springs help, but you'll still be sharing, just with far less of a squeeze than on a UK king.
How much more space does the UK super king give than the UK king?
The UK super king is 30cm wider than the UK king, and the two are the same length. For two people sharing, that works out as 15cm more each. It's a modest gain on paper, but you'll notice it most when a child or pet joins you or when one of you sleeps restlessly.
Will I feel my partner move on the SleepSoul Space Memory Pocket 3000 in super king?
Less than you would on a smaller size. The pocket springs move independently, which limits how far movement spreads, and at this size you also have 90cm each of physical distance. For a genuinely restless partner, that extra space often makes more difference than any comfort layer can.
Do I need special sheets for the SleepSoul Space Memory Pocket 3000 super king?
Yes, on two counts. You'll need super king sheets and a 260 x 220cm duvet, and because the mattress is 36cm deep, look for deep fitted sheets rather than standard ones. Budget for this before you buy, as bedding at this size costs more than for a UK double or UK king.
Should I choose the UK super king or the UK double of this mattress?
The UK super king is 45cm wider and 10cm longer than the UK double, giving 22.5cm more each for two sharing. That's a big step up for families or restless sleepers. If your room is tighter, the UK double needs at least 2.6m x 2.8m, against our suggested 3m x 2.9m for the UK super king.