SleepSoul Heaven 3000 CoolGel Pillow Top King Size Mattress
The SleepSoul Heaven 3000 CoolGel Pillow Top Mattress pairs a Cool Gel foam layer with a pocket spring core and a pillow top, which means a softer surface feel on a medium-firm to firm base.
- Soft pillow top over firm support
- Cool Gel foam disperses heat
- Minimises partner disturbance
£388
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
SleepSoul Heaven 3000 CoolGel Pillow Top Mattress
More available sizes
Mattress details
Mattress
SleepSoul Heaven 3000 CoolGel Pillow Top Mattress
Size
Firmness
Medium Firm
Construction
Foam
Gel
Pocket Spring
Rolled
Depth (cm)
30
Layers
3
Layer Details
Pillow top
A 2cm layer of soft foam in the microquilted surface. It gives the top a softer, more cushioned feel without changing the medium to firm rating.
Cool Gel foam
A 3cm Cool Gel foam layer under the pillow top that contours to the body. It also helps disperse heat, so you get shaping with less warmth.
Pocket spring core
1000 individually pocketed springs, with 2000 mini pocket springs added for bounce and comfort. The mini springs reduce motion transfer, so you're less likely to feel a partner move.
Layer details from mattressonline.co.uk product page, October 2026.
Key benefits
- More room each: The UK king gives 7.5cm more each than the UK double, which means fewer knees and elbows meeting in the middle at two in the morning.
- Length for a tall partner: At 200cm, the UK king is 10cm longer than the UK double, so a tall sleeper can stretch out without their feet hanging over the edge.
- Calmer early starts: SleepSoul says the mini pocket springs reduce motion transfer, and the extra width helps too, so a partner leaving hours before you is less likely to wake you.
- Space for heat to escape: Two people generate a fair bit of warmth, and the wider surface plus the Cool Gel foam layer, there for heat dispersal, should help if either of you runs hot.
- Room to plan around: We suggest a bedroom of at least 2.7m x 2.9m for the UK king, with 3.2m x 3.2m giving comfortable space to walk round both sides.
This size suits you if...
You share the bed every night and keep ending up in each other's space on a double, one of you is tall enough that length matters as much as width, or you keep very different hours and want to disturb each other less.
Consider another size if...
Your bedroom is smaller than our suggested 2.7m x 2.9m once furniture is in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Is the SleepSoul Heaven 3000 UK king big enough for two people?
For most couples, yes. The UK king gives 75cm each, which is 7.5cm more each than the UK double. If one of you sprawls, or a dog regularly joins you, the UK super king gives 90cm each, so the UK king gives 15cm less each than that.
Will a UK king Heaven 3000 fit in my bedroom?
We suggest at least 2.7m x 2.9m, with 3.2m x 3.2m feeling comfortable. New build master bedrooms can feel smaller once wardrobes go in, so measure the floor you'll really have, then compare the retailers listed on this page. Leave space to turn the mattress using its handles, because it can't be flipped.
Is a UK king mattress long enough for someone tall?
The UK king is 200cm long, which is 10cm longer than the UK double. It's the same length as the UK super king, so if length is your main reason for upgrading, the UK king gives you that extra room without needing the wider bed.
Should we choose the UK king or UK super king Heaven 3000?
The UK super king is 30cm wider and gives 90cm each, against 75cm each on the UK king. It needs more floor, though: we suggest at least 3m x 2.9m for the UK super king. If your room is tighter than that, the UK king is the sensible upgrade from a double.
What bedding fits the SleepSoul Heaven 3000 in UK king?
Standard king sheets and a 230 x 220cm king duvet fit the 150 x 200cm surface. The mattress is 30cm deep, so check that any fitted sheet has a pocket deep enough to tuck well under the corners.