Kaymed ClimaCool 4400 King Size Mattress
The Kaymed ClimaCool 4400 is a medium-feel hybrid built around temperature control.
- Moves warmth away from your body
- Medium feel for back & side sleepers
- Ergonomic postural support
£1,799
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.
Kaymed ClimaCool 4400 Mattress
More available sizes
Mattress details
Mattress
Kaymed ClimaCool 4400 Mattress
Size
Firmness
Medium
Construction
Foam
Pocket Spring
Hybrid
Depth (cm)
34
Layers
2
Layer Details
ClimaCool foam comfort layer
A 6cm layer of ClimaCool foam infused with Phase Change particles and carbon crystals. These work to regulate temperature, which means heat is drawn away from you rather than building up where you lie.
Pocket springs
A pocket spring unit, with 4,400 springs in the king size, provides ergonomic postural support. Each spring moves independently, so the mattress follows the shape of your spine rather than pushing back as one flat surface.
Layer details from furniturevillage.co.uk product page, September 2026.
Key benefits
- Real space for two: At 150 x 200cm you get 75cm each for two people sharing, which means turning over stops being a negotiation.
- Less disturbance on different schedules: Pocket springs move independently, so an early alarm and a quiet exit on one side transmits far less to the person still asleep.
- Cooling that two people need more: Sharing a bed doubles the heat; the ClimaCool foam's Phase Change particles and carbon crystals draw that warmth away rather than letting it build between you.
- Length for taller sleepers: The UK king runs to 200cm, 10cm longer than the UK double, which is the difference between feet on the mattress and feet off it.
- Substantial depth to plan for: At 34cm deep this is a tall mattress, so on a UK king base check your fitted sheets are deep-pocketed before it arrives.
This size suits you if...
You share the bed every night and a UK double leaves you brushing elbows, one of you runs warm enough that a cooling mattress is the point of the purchase, or one of you is approaching six foot and wants that extra 10cm of length over a UK double. It also suits couples on mismatched schedules, since the pocket springs keep one person's movements from waking the other.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest for a UK king. In that case we'd recommend the UK double instead, which needs around 2.6m x 2.8m and still sleeps two.
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
What size is the Kaymed ClimaCool 4400 UK king?
It measures 150 x 200cm, or 5ft x 6ft 6in. That's the standard UK king footprint, so any UK king bed frame, sheets and a 230 x 220cm king duvet will fit. Bear in mind the 34cm depth when buying fitted sheets, as shallower ones may not stretch over the corners.
How much space do two people get on a UK king ClimaCool 4400?
Two people sharing get 75cm each. That's enough to shift position, prop pillows during pregnancy or after an injury, or share with a dog who takes more than a fair portion, without ending up pressed together. The pocket springs help too, keeping one sleeper's movement from travelling across the mattress.
What room size do I need for the ClimaCool 4400 in a UK king?
We suggest at least 2.7m x 2.9m, with 3.2m x 3.2m feeling comfortable. Measure carefully in a new build master bedroom: they often look generous empty but tighten quickly once wardrobes go in. That guidance is ours rather than Kaymed's, so treat it as a starting point for your own layout.
Is the UK king long enough for someone over six foot?
At 200cm long, the UK king gives a taller sleeper noticeably more room than the 190cm of a UK single, small double or double. If one of you is around six foot, that extra 10cm of length is often the upgrade you actually feel, more than the added width.
Should we buy the ClimaCool 4400 in a UK king or a UK super king?
The UK king is 30cm narrower than the UK super king, and the two are the same length. If you both spread out, or a pet shares the bed nightly, the UK super king is tempting, but it needs a room of at least 3m x 2.9m. For most couples the UK king is the practical middle ground.