SleepSoul Heaven Gel Pocket 1000 Pillowtop Super King 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
£320.03
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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
- Distance from a restless partner: With 90cm each for two people sharing, a partner's tossing and turning happens further away, and the individually pocketed springs help keep their movement on their own side.
- Room when the bed fills up: When a child wanders in at 3am or the dog settles across the foot of the bed, the 180cm width means nobody ends up clinging to the edge.
- All the gain goes into width: Next to the UK king you get 15cm more each at the same 200cm length, so every extra centimetre goes into side-to-side space where couples feel it.
- Easier to move than its size suggests: Because it arrives vacuum-packed and rolled, a 6ft-wide mattress can still get round a tight landing turn that a flat super king would struggle with.
- Cooler for two bodies: Two people under a 260 x 220cm duvet build up warmth, and the CoolGel foam layers with a breathable knit cover help the surface run a little cooler.
- In proportion with a large room: In a period property or a generous master bedroom, the 180cm width fills the space properly, where a UK king can look slightly undersized.
This size suits you if...
You share the bed every night with a partner who fidgets, kicks or rises early, your children or a large dog join you as a matter of routine, and your bedroom comfortably clears our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom is under 3m x 2.9m, or the door swing leaves little walking space. 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 Heaven Gel Pocket 1000 UK super king big enough for two adults and a child?
It's the widest size this mattress comes in, 30cm wider than the UK king. Two adults get 90cm each, so a young child who climbs in during the night is far less likely to push anyone towards the edge than on a smaller size.
What size bedroom do I need for a UK super king mattress?
We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable. In a loft conversion, the slope of the ceiling usually decides which wall the headboard goes against, so measure the full-height floor area rather than the whole room. Check the door can open fully past the bed corner too.
Will a super king mattress in a box fit up narrow stairs?
This one is vacuum-packed and rolled, so you're carrying a box up the stairs rather than a rigid panel 6ft wide. Once it's unrolled in the bedroom it expands to its full 180 x 200cm, so open it in the room where it will stay.
UK super king vs UK king: how much extra space do you get?
The UK super king is 30cm wider than the UK king and the same length. For two people sharing, that works out at 90cm each on the UK super king against 75cm each on the UK king, a gain of 15cm per person.
What bedding fits the SleepSoul Heaven Gel Pocket 1000 in a UK super king?
You'll need super king fitted sheets and a 260 x 220cm duvet. The mattress is 25cm deep, so check the fitted sheet's pocket depth suits that before buying. Super king bedding usually costs more than king, which is easy to forget when budgeting.