SleepSoul Heaven Gel Pocket 1000 Pillowtop King Size Mattress in a Box
The SleepSoul Heaven Gel Pocket 1000 Pillowtop Mattress in a Box has gel foam comfort layers and a pillow top, which means a medium feel with a cushioned surface.
- Medium feel suits most sleepers
- Cushioned pillow top comfort
- Gel foam helps you sleep cooler
£266.80
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SleepSoul Heaven Gel Pocket 1000 Pillowtop Mattress in a Box
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Mattress details
Mattress
SleepSoul Heaven Gel Pocket 1000 Pillowtop Mattress in a Box
Size
Firmness
Medium
Construction
Foam
Gel
Memory Foam
Pocket Spring
Rolled
Depth (cm)
25
Layers
5
Layer Details
Cover
A soft quilted or stretch knit cover, described as a breathable knit. It's the first thing you feel, and it helps air move through the surface.
CoolGel foam
A 2cm layer of CoolGel foam within the quilting. It adds cushioning and has cooling properties, so the surface feels softer without trapping as much heat.
CoolGel foam
A second 2cm layer of CoolGel foam. Together with the first it builds the pillow top feel and gives more give under your shoulders and hips.
Memory/support foam
A 1cm layer of foam, described as memory or support foam. It sits between the gel and the springs, so the comfort layers don't feel the springs underneath.
Pocket springs
1000 individually pocketed springs in cloth sleeves, with a foundation layer beneath. Each spring moves on its own, so the mattress responds to your body and gives steady support.
Layer details from mattressonline.co.uk product page, October 2026.
Key benefits
- More room each: At 150 x 200cm the UK king gives you 75cm each, which is 7.5cm more per person than the UK double and enough to stop sharing one hollow.
- Length for taller sleepers: The 200cm length, 6ft 6in in imperial, adds 10cm over the UK double, so a partner over six foot can stretch out with their ankles still on the mattress.
- Less disturbance on different schedules: The 1000 springs sit in their own cloth pockets, which means an early riser getting up is less likely to jolt a partner who still has hours to sleep.
- Space to prop and shift: If you're pregnant or recovering, the extra width leaves room for a wedge or body pillow without pushing your partner towards the edge.
- Easier to get upstairs: It arrives rolled and vacuum-packed, so a mattress this wide is far simpler to carry up a narrow staircase than a flat, boxed spring mattress would be.
This size suits you if...
You share the bed every night and wake up feeling crowded on a double, one of you is tall enough that the foot of the bed has become a problem, or your sleep times rarely line up and you want space between you.
Consider another size if...
Your bedroom falls short of our suggested minimum of 2.7m x 2.9m. In that case we'd recommend the UK double instead, which we suggest placing in a room of at least 2.6m x 2.8m.
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FAQ's
Is the SleepSoul Heaven Gel Pocket 1000 UK king big enough for a couple?
For most couples, yes. The UK king gives you 75cm each, which is 7.5cm more per person than the UK double. That sounds small on paper, but it is often the difference between lying side by side and lying in each other's way.
Is the UK king SleepSoul Heaven long enough for someone over 6ft?
It is 200cm long, or 6ft 6in, which adds 10cm over the UK double. If one of you is over six foot, that extra length is often the real reason to upgrade, since the UK double and smaller sizes stop at 190cm.
What size bedroom do I need for a king size SleepSoul Heaven mattress?
We suggest allowing at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling comfortable. Remember to measure once wardrobes and bedside tables are in place, because a room can feel a good deal smaller with furniture around the bed.
Will I feel my partner move on the SleepSoul Heaven king size?
Less than on an open coil design. Each of the 1000 springs moves on its own inside a cloth pocket, and the UK king's 75cm per person puts a little more distance between you. A partner turning over or getting up early should cause a smaller ripple across your side.
Should I choose the SleepSoul Heaven in a UK king or UK super king?
The UK super king is the same length but gives 90cm each, 15cm more per person than the UK king. It also needs more floor space: we suggest at least 3m x 2.9m. If your room is tighter than that, the UK king is the sensible choice.