SleepSoul Coolology 3000 Ortho CoolGel King Size Mattress
The SleepSoul Coolology 3000 Ortho CoolGel is a 32cm hybrid that pairs pocket springs with cool gel memory foam under a deep pillow top.
- Gel pillow top draws heat away
- Firm support that adapts to you
- Minimises partner disturbance
£449
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SleepSoul Coolology 3000 Ortho CoolGel Mattress
More available sizes
Mattress details
Mattress
SleepSoul Coolology 3000 Ortho CoolGel Mattress
Size
Firmness
Firm
Construction
Foam
Pocket Spring
Hybrid
Rolled
Memory Foam
Depth (cm)
32
Layers
4
Layer Details
Pillow Top
A deep pillow top filled with cool gel memory foam, which means a cushioned surface that actively draws heat away from your body. It helps regulate your temperature through the night rather than letting warmth build up.
Cool Gel Memory Foam
This layer adds pressure relief and support, moulding to your shape for a more comfortable night. It regulates body temperature better than standard memory foam, so hot sleepers get the contouring without the heat.
Pocket Springs
Each spring sits in its own fabric pocket and moves independently, which means support and pressure relief exactly where your body needs it. It also helps limit motion transfer if you share the bed.
Knitted Cover
A soft, breathable knitted cover that lets air move through the surface. That helps keep you at an even temperature all night long.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- More room each: At 75cm per person, the UK king gives each of you 7.5cm more than the UK double, which means fewer nights clinging to your own edge.
- Length for taller partners: At 200cm long, it's 10cm longer than the UK double, so a partner over six foot can stretch out without their feet reaching the end.
- Calmer on different schedules: Each spring sits in its own pocket, which means when one of you rises hours before the other, less of that movement carries across to the side still sleeping.
- Cooler for two: Cool gel foam in the pillow top draws heat away, and the extra width lets you keep a little distance, so you're less likely to warm each other up.
This size suits you if...
You share the bed every night and keep waking when your partner shifts or gets up early, one of you is over six foot and fed up with feet at the footboard, or your bedroom gives at least 2.7m x 2.9m once furniture is in.
Consider another size if...
Your bedroom falls short of our suggested 2.7m x 2.9m. We'd recommend the UK double instead, for which we suggest at least 2.6m x 2.8m.
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FAQ's
Is the SleepSoul Coolology 3000 UK king big enough for two people?
For most couples, yes. The UK king gives 75cm each, which is 7.5cm more per person than the UK double. If you want more still, the UK super king gives 90cm each, though it needs a bigger room: we suggest at least 3m x 2.9m for the UK super king.
Will I feel my partner move on the Coolology 3000 king size?
Less than on a smaller size. The pocket springs move independently, so a partner turning over or getting up early is less likely to jolt your side. The 150cm width of the UK king also puts a little more distance between you than the UK double, which helps if your schedules rarely line up.
Is a UK king Coolology 3000 long enough for someone over 6ft?
The UK king is 200cm long (6ft 6in), which is 10cm longer than the UK double. That extra length is often the real reason taller couples upgrade. The UK super king is the same length, so you'd only size up for width, not legroom.
What room size do I need for the SleepSoul Coolology 3000 in UK king?
We suggest at least 2.7m x 2.9m, with 3.2m x 3.2m feeling comfortable. New build master bedrooms can feel smaller than their floor plan once fitted wardrobes are in, so measure the clear floor space and allow room to walk round both sides.
Is the Coolology 3000 UK king heavy to rotate?
Yes, this is a heavy 32cm hybrid, and the UK king is one of the larger sizes, so rotating it alone is hard work. SleepSoul doesn't publish a weight for this size, so plan on two of you turning it together.