SleepSoul Space Memory Pocket 3000 Boxtop Mattress in a Box
Mattress
SleepSoul Space Memory Pocket 3000 Boxtop Mattress in a Box
Size
Firmness
Construction
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.
- 7.5cm more each than a UK double: Each of you gets 75cm rather than the 67.5cm a UK double allows, which means fewer knees and elbows meeting in the middle at 3am.
- Early starts carry less: If one of you is up hours before the other, the 1000 independent pocket springs keep that movement local, and the wider surface adds distance.
- Length for taller sleepers: At 6ft 6in long, the UK king adds 10cm over a UK double, so a partner over six foot can lie straight without their feet reaching the edge.
- Space to prop and shift: During pregnancy, when a bump or back pillow takes up room, 75cm each leaves space to change position while the memory foam cushions hips and shoulders.
- Budget for deep bedding: The one catch is depth: at 36cm, the UK king needs deep pocket fitted king sheets, so check the pocket depth before buying bedding.
This size suits you if...
You share the bed every night and a UK double has started to feel cramped, one of you is over six foot and wants the extra length, or you keep different hours and would like the early riser's movements to stay on their own side.
Consider another size if...
Your bedroom is smaller than our suggested minimum of 2.7m x 2.9m for a UK king. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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Is the SleepSoul Space Memory Pocket 3000 UK king big enough for two people?
For most couples, yes. The UK king gives you 75cm each, compared with 67.5cm on a UK double. If you both sprawl, or a dog joins you most nights, the UK super king gives 90cm each, although it needs a larger room.
Will a tall person fit on the SleepSoul Space Memory Pocket 3000 in a UK king?
The UK king is 200cm long, or 6ft 6in, which is 10cm longer than a UK double. That usually makes the difference for anyone around six foot. The UK super king is the same length, so sizing up only adds width, not length.
Should I get the SleepSoul Space Memory Pocket 3000 in a UK king or UK super king?
The UK super king is 30cm wider and gives 90cm each, so the UK king gives you 15cm less each. The trade-off is floor space. We suggest at least 3m x 2.9m for a UK super king, against 2.7m x 2.9m for the UK king.
Will a king size SleepSoul mattress fit in a new build master bedroom?
Measure after the wardrobes are in, because new build rooms often shrink once furniture arrives. We suggest at least 2.7m x 2.9m for a UK king, and 3.2m x 3.2m is comfortable if you want bedside tables and room to walk round both sides.
Does a king size SleepSoul Space Memory Pocket 3000 help with a restless partner?
It should help. The 1000 pocket springs and 2000 mini springs move independently, which limits how far movement travels, and the UK king adds 15cm of width over a UK double. Across the two, a partner shifting or getting up early is less likely to wake you.