Kaymed Smart Phase 2000 Pocket Hybrid Mattress
Mattress
Kaymed Smart Phase 2000 Pocket Hybrid Mattress
Size
Firmness
Medium Soft
Construction
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.
- 90cm of space each: Two sharers each get 90cm of width, which means a fidgety partner can turn over without pulling you out of your own comfortable spot.
- Pocket springs suit sharing at this width: The 2,000 pocket springs move independently, so across the full 180cm of this size, one sleeper's movement stays largely on their side.
- Room for the whole household: If children or pets regularly find their way in overnight, the super king is the one size where everyone can still claim a reasonable share.
- Cool surface, big footprint: The Smart Phase foam's phase-change crystals help regulate temperature, useful when three or four warm bodies share the same mattress on a summer night.
- 30cm wider than a UK king: The UK super king is 30cm wider than the UK king and the same length, a difference you feel every night rather than a marginal upgrade.
This size suits you if...
You share the bed every night and want the most space UK retailers stock as standard, your partner is genuinely restless and distance matters more to you than any comfort layer, or children and pets treat your bed as their own. A larger master bedroom of at least 3m x 2.9m helps, and the softer, cradling feel appeals more than a firm platform.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest for a UK super king, or you sleep alone. We'd recommend the UK king instead, which is 30cm narrower, the same length, and needs a room of at least 2.7m x 2.9m.
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What are the dimensions of the Kaymed Smart Phase 2000 super king?
The UK super king measures 180 x 200cm, or 6ft x 6ft 6in. Two people sharing get 90cm of width each. At 32cm deep, it's a substantial mattress, so check your fitted sheets are deep enough for it as well as wide enough for the super king footprint.
Will the Kaymed Smart Phase 2000 super king fit in my bedroom?
We suggest a room of at least 3m x 2.9m for a UK super king, which leaves space to walk around the bed and open drawers. That's our guidance rather than Kaymed's. In a loft conversion, the ceiling slope often decides which wall can take a bed this wide, so measure carefully.
Is the super king worth it over the king for this mattress?
The UK super king is 30cm wider than the UK king and the same length. If your partner moves a lot at night, that extra width does more for undisturbed sleep than any foam layer can. If you're two settled sleepers in a modest room, the UK king is usually enough.
Can a family share the Kaymed Smart Phase 2000 in a super king?
It's the size best suited to it. When a child wanders in at 3am, 180cm of width means everyone keeps a workable share, and the 2,000 pocket springs respond to each body separately. Bear in mind the soft to medium feel is more cradling than firm, which lighter children tend to like.
Will movement transfer across a mattress this wide?
Less than you might expect. Each of the 2,000 pocket springs sits in its own fabric pocket and compresses independently, and with 90cm of width per sleeper, most movement happens well away from you anyway. The soft surface does cushion rather than resist, so a very heavy sleeper shifting position may still register slightly.