SleepSoul Space Ortho Memory Pocket 4000 Boxtop Mattress in a Box
Mattress
SleepSoul Space Ortho Memory Pocket 4000 Boxtop Mattress in a Box
Size
Firmness
Construction
Depth (cm)
38
Layers
7
Layer Details
- Top Layer. A sumptuously soft pillow-top layer of plush filling sits right at the surface. This gives extra cushioning before you reach the firmer support below.
- Tencel Knitted Top Fabric. The knitted cover is made from Tencel, a soft, breathable fabric. It helps the surface stay cooler through the night.
- Foam Layer. A 1cm foam layer paired with 3.5cm of memory foam offers two levels of comfort and support. The memory foam element moulds gently to your shape.
- Cool Gel / Memory Foam. 3.5cm of cool gel acts as a transition layer, which means a controlled sink rather than a sudden drop, with movement kept to a minimum. The memory foam contours to your body and eases pressure points.
- Mini Pocket Springs. An additional 2000 mini pocket springs sit above the main spring unit. These add a finer level of comfort and support close to the surface.
- Pocket Springs. 2000 pocket springs conform to your body's shape, supporting you where you need it most. Because each spring moves independently, they help prevent the roll-together effect on a shared bed.
- Base. A non-slip fabric base adds stability. It helps keep the mattress in place on your bed frame.
Layer details from sleepsoul.co.uk product page, September 2026.
- 90cm each for two sharing: Each of you has the width of a UK single to yourself, which means elbows, knees and midnight turns rarely land on the other person.
- Room left when the household arrives: When a child pads in after a bad dream or the dog settles at your feet, the UK super king still leaves both adults a usable share of the bed.
- Distance plus independent springs: The extra width keeps a fidgety partner physically further away, and the individually moving pocket springs and gel layer limit how much of their movement still travels across.
- Sized for a large master bedroom: In a period property or a generous new build master, a UK super king fills the space in proportion where a UK king can look a little lost.
- Same length as the UK king: You gain 30cm of width over the UK king without any extra length, so the bed only grows sideways into the room.
This size suits you if...
You share with a partner who tosses and turns, your children or a large dog regularly end up in the bed by morning, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your room is smaller than 3m x 2.9m, or the extra width would mostly go unused. We'd recommend the UK king instead, which we suggest for rooms of at least 2.7m x 2.9m.
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Is the SleepSoul Space Ortho super king big enough for two adults and a child?
For occasional visits, yes. At 180 x 200cm, the UK super king gives two adults 90cm each, so a small child tucked in between still leaves everyone some room. It won't feel spacious with three every night, though. The firm feel suits most adults, but a light child may find it quite solid.
How much bigger is the SleepSoul Space Ortho super king than the king?
The UK super king is 30cm wider than the UK king, and both are the same length. For two people sharing, that works out at 15cm more each: 90cm on the UK super king against 75cm on the UK king. The extra room goes entirely into width, where restless sleepers need it.
Will a super king mattress stop my partner's movement waking me?
It helps more than most changes you could make. With 90cm each on the UK super king, a partner who turns a lot is simply further from you. On this mattress the pocket springs move independently and the cool gel layer keeps movement contained, so less of what does reach your side is felt.
Is the Space Ortho super king worth it over the double for a couple?
If your room can take it, the difference is large. The UK super king is 45cm wider and 10cm longer than the UK double, which gives each of you 22.5cm more width. Taller sleepers gain legroom too. A cramped room makes the UK double the more sensible choice.
What should I check before ordering the SleepSoul Space Ortho in a UK super king?
Measure the room against our suggested minimum of 3m x 2.9m, with around 3.5m x 3.2m feeling right. Check that the door swings clear once the bed is in, and allow for super king sheets and a 260 x 220cm duvet. At 38cm deep, look for deep-pocket fitted sheets.