Kaymed Smart Phase 2000 Pocket Hybrid King Size Mattress
The Kaymed Smart Phase 2000 Pocket Hybrid pairs an 85mm layer of Smart Phase foam, infused with phase-change crystals plus copper and microbeads to help regulate temperature, with a core of 2,000 pocket springs (a count based on the kingsize).
- Phase-change foam for hot sleepers
- Soft pressure relief for side sleepers
- Supportive bounce from pocket springs
£1,139
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Kaymed Smart Phase 2000 Pocket Hybrid Mattress
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Mattress details
Mattress
Kaymed Smart Phase 2000 Pocket Hybrid Mattress
Size
Firmness
Medium Soft
Construction
Foam
Pocket Spring
Hybrid
Depth (cm)
32
Layers
2
Layer Details
Smart Phase foam
An 85mm layer of Smart Phase foam infused with patented phase-change crystals, which absorb and release body heat as you sleep. Copper and microbeads are added to the mix to further promote temperature regulation, so hot sleepers should feel the benefit most.
Pocket springs
A core of 2,000 pocket springs, each secured in its own fabric pocket, which means the springs move independently and respond to your body rather than the whole bed shifting. The sturdy spring material is designed for supportive bounce and durability.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Proper space for two: At 75cm each for two people sharing, both of you can settle into the medium soft surface without drifting into each other's half.
- The full 2,000 springs: Kaymed's spring count is based on the kingsize, so this is the size where the quoted 2,000 pocket springs actually apply.
- Less partner disturbance: Each spring sits in its own fabric pocket, which means an early alarm on one side transfers less movement to the other.
- Length for taller sleepers: The UK king is 10cm longer than the UK Double, so feet stay on the mattress rather than hanging past a 190cm edge.
- Cooling that scales with sharing: Two bodies generate more heat than one, and the phase-change crystals with copper and microbeads help the wider surface stay temperate.
This size suits you if...
You share the bed every night and a UK double has started to feel cramped, especially on a soft, contouring surface like this one. Or you and your partner keep different hours, one of you slipping out early, and you want the pocket springs and extra width working together to keep that quiet. Or someone in the bed is approaching six foot and needs the 200cm length.
Consider another size if...
Your bedroom is smaller than the 2.7m x 2.9m we suggest for a UK king, perhaps a new build master that shrinks once the wardrobes go in. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m.
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FAQ's
Is the UK king Kaymed Smart Phase 2000 big enough for a couple?
Yes, comfortably for most. The 150 x 200cm footprint gives 75cm each for two people sharing, and that width matters here because the medium soft feel cradles you where you lie. With more personal space, each of you settles into your own contour rather than rolling towards a shared dip.
Does the 2,000 spring count apply to the UK king size?
Yes. Kaymed bases the spring count on the kingsize, so the UK king is the size the 2,000 figure actually describes. Each spring sits in its own fabric pocket and moves independently, which is how the mattress responds to two sleepers separately rather than as one shifting surface.
Will the Kaymed Smart Phase 2000 in a UK king help with partner disturbance?
It should, more than a smaller size would. The pocket springs move independently, so when one of you gets up hours before the other, less of that movement travels across the bed. The UK king is 15cm wider than the UK Double, which adds a physical buffer on top of the spring design.
What room size suits the UK king Kaymed Smart Phase 2000?
We suggest a room of at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling comfortable. That's our guidance rather than Kaymed's, and it allows walking space around the bed plus bedside tables on both sides. Measure with wardrobes and door swing in mind before ordering.
Should I choose this mattress in a UK king or a UK super king?
If space allows, the UK super king is 30cm wider than the UK king, though the two are the same length, so taller sleepers gain nothing there. We suggest at least 3m x 2.9m of room for the UK super king. For most couples the UK king balances space against room demands well.