Coolflex Essentials Pocket Memory Hybrid Mattress
Mattress
Coolflex Essentials Pocket Memory Hybrid Mattress
Size
Firmness
Construction
Depth (cm)
24
Layers
2
Layer Details
- Memory Foam. A 2cm layer of memory foam sits on top, moulding to your body for orthopaedic support and comfort. In practice, this means less pressure on your hips and shoulders as you settle in.
- Pocket Springs. Beneath the foam are 800 individual pocket springs, each hand-sewn into its own fabric pocket. They work independently, so the mattress responds to your shape rather than moving as one unit.
Layer details from mattressnextday.co.uk product page, September 2026.
- 90cm each for two sharing: Each of you gets 90cm of the medium-feel surface, which means a restless partner turning over happens too far away to wake you.
- Springs that keep movement local: The 800 pocket springs move independently, so across a 180cm width a dog jumping up on one side barely registers on the other.
- Space when children wander in: On nights a small visitor arrives, the full 6ft of width means everyone keeps a workable share rather than someone clinging to an edge.
- 30cm wider than a UK king: You get 30cm more width than the UK king at the same length, a difference you feel every night if you currently meet in the middle.
- A large room, properly filled: In a big master bedroom a smaller mattress can look lost, and this size sits in proportion, provided you allow at least 3m x 2.9m.
This size suits you if...
You share the bed every night and want the most sleeping space a standard UK size offers, your partner is a genuinely restless sleeper and distance matters more to you than any comfort layer, or children and pets regularly join you and you'd rather plan for it than squeeze around it. Your bedroom measures at least 3m x 2.9m, ideally more.
Consider another size if...
Your room falls short of the 3m x 2.9m we suggest for the UK super king, or you sleep alone. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m and is the same length.
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How big is the Coolflex Essentials super king mattress?
It measures 180 x 200cm, or 6ft x 6ft 6in. That is the largest size Coolflex makes in this mattress, and the widest size UK retailers stock as standard. The depth stays at 24cm across the range, so standard super king fitted sheets with a reasonable pocket will fit without a struggle.
How much space does each person get on a super king?
Two people sharing get 90cm each, the same width you'd have to yourself on a single bed. On this mattress that space works with the 800 pocket springs, which respond to each sleeper separately, so you feel your own support rather than your partner's weight shifting the surface.
What room size do I need for the Coolflex Essentials super king?
We suggest a room of at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable. That's our guidance rather than the brand's. Before ordering, check the door swing and any tight landing turns too: at 180cm wide this size is the one most likely to catch you out on stairs.
Is the Coolflex Essentials worth sizing up from king to super king?
The UK super king is 30cm wider than the UK king and the same length, so the whole gain goes into width, which is where sharing couples feel cramped. If your partner is restless or children join you at night, that extra 30cm does more for your sleep than any change in comfort layer would. Small or solo rooms won't see the benefit.
Is a super king a good choice for a medium hybrid like this?
Yes, if space is your priority. The medium feel with a 2cm memory foam top suits most sleepers, and at this width the pocket springs' independent movement matters more, since disturbances have further to travel and less spring transfer to carry them. Heavier sleepers wanting a thicker comfort layer should look at a different mattress rather than a different size.