Kaymed Smart Phase 1600 Pocket Hybrid Mattress
Mattress
Kaymed Smart Phase 1600 Pocket Hybrid Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
27
Layers
3
Layer Details
- Smart Phase Foam. A 50mm layer of Kaymed's exclusive Smart Phase foam, infused with microbeads, copper and phase change crystals. It thermoregulates by moving heat away from the mattress surface, absorbing and releasing body heat to keep you at a comfortable temperature.
- Reflex Foam Comfort Layer. A soft, flexible reflex foam that sits between you and the springs. It adds the support needed for good spinal alignment without a hard, boardy feel.
- Pocket Springs Support System. 1600 pocket springs, based on the kingsize mattress, each housed in its own fabric pocket. They react independently to movement through the night, which means the mattress shapes around your body rather than tilting you towards a partner.
Layer details from mattressonline.co.uk product page, September 2026.
- 90cm each, every night: Two people sharing get 90cm each, which means a partner who fidgets or runs hot is simply further away from you.
- Pocket springs plus distance: The 1600 pocket springs react independently to movement, and across a 180cm width there's little chance of feeling a partner turn over.
- Cooling that covers the whole surface: The Smart Phase foam layer moves body heat away from the surface, useful when two adults and an occasional visiting child are all generating warmth.
- Usable right to the edge: A foam encapsulated border means the outer inches still support you, so the full 180cm width is sleeping space rather than a soft perimeter.
- Same length as a UK king: At 200cm long, the UK super king matches the UK king for length, so sizing up buys you 30cm of width without changing how far the bed reaches into the room.
This size suits you if...
You share the bed every night and want the widest size UK retailers stock as standard, your children or a large dog regularly join you and everyone still needs a fair share, or a restless partner keeps disturbing you and the 90cm each this size provides would put genuine distance between you. Your room comfortably clears the 3m x 2.9m we suggest as a minimum.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest, or the bed would leave no walking space around it. We'd recommend the UK super king's nearest sibling, the UK king, instead: it's 30cm narrower, the same length, and we suggest at least 2.7m x 2.9m for it.
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What size room do I need for the Kaymed Smart Phase 1600 super king?
We suggest at least 3m x 2.9m. That allows the 180 x 200cm mattress to sit with enough space to walk around it, open drawers and change the bedding without a squeeze. In a tighter room the bed will dominate, and you may find the UK king, at 30cm narrower, a more comfortable fit.
Is the Kaymed Smart Phase 1600 super king worth it over the UK king?
If someone else shares your bed regularly, usually yes. The UK super king is 30cm wider than the UK king and the same length, and with 90cm each for two people sharing, a fidgety partner becomes far easier to ignore. If you sleep alone or your room is under 3m wide, the UK king makes more sense.
Is a super king big enough when children climb in at night?
It's the best-placed standard size for it. With 90cm each for two adults, a small visitor in the middle still leaves both of you a workable share, and the pocket springs shape around each body independently rather than tilting everyone towards the heaviest sleeper. The foam encapsulated border also keeps the edges supportive when someone ends up sleeping on one.
Does the super king version have more than 1600 pocket springs?
Kaymed quotes the 1600 spring count on the kingsize mattress and doesn't publish a separate figure for the UK super king, so check with the brand if the exact number matters to you. What you can rely on is the same construction: independently moving pocket springs beneath the Smart Phase foam, across the full 180cm width.
Will the Smart Phase foam keep two people cool in this size?
The Smart Phase layer runs across the whole 180 x 200cm surface, so both sleepers get the same heat-shifting effect rather than one cooler side. The width helps too: with 90cm each, you're less likely to be sharing body heat in the first place, which is half the battle for warm sleepers who share.