Coolflex Essentials Pocket Super King Mattress
The Coolflex Essentials Pocket Mattress is an entry-level hybrid, pairing an 800 pocket spring unit with a soft Reflex foam comfort layer under a knitted cover.
- Minimises partner disturbance
- Support that adjusts to your shape
- Cushions shoulders & hips
£269
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Coolflex Essentials Pocket Mattress
More available sizes
Mattress details
Mattress
Coolflex Essentials Pocket Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Depth (cm)
24
Layers
3
Layer Details
Knitted cover
A super-soft knitted cover with a touch of breathability, which means a gentler first impression when you lie down and a little help letting warm air escape.
Soft foam comfort layer
A layer of soft Reflex foam sits beneath the cover, cushioning shoulders and hips. It softens the feel of the springs below without making the mattress feel plush overall.
800 pocket spring unit
Pressure-reactive springs work independently, which means support tailored to where your body needs it and virtually no motion transfer across the bed. If you share, you should feel far less of your partner's movement.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- 90cm of width each: Two people sharing get 90cm each, the same width as a whole UK single, so you can both stretch out without negotiating territory.
- Pocket springs suit a big shared bed: The 800 springs move independently, which means a partner turning over at the far side of 180cm of mattress is doubly easy to sleep through.
- Room for night-time visitors: When children or pets end up in the bed, the full 6ft of width means the adults still get a reasonable share of it.
- Standard depth, easy bedding: At 24cm deep, standard super king fitted sheets go on without a struggle, and Coolflex's slimmer profile keeps the sheer bulk of this size manageable.
- Big bed, entry-level spend: A super king is usually where budgets strain, so a simpler hybrid build makes the jump to maximum space easier to justify.
This size suits you if...
You share every night and want the most sleeping space UK retailers stock as standard, your partner is restless and you've learned that distance matters more than any comfort layer, or children and pets treat your bed as theirs and you'd like everyone to fit. You'll also need the room for it: we suggest at least 3m x 2.9m.
Consider another size if...
Your bedroom is under our suggested 3m x 2.9m minimum, or the bed would dominate the space. We'd recommend 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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FAQ's
What size room do I need for a super king Coolflex Essentials?
We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling more comfortable. That allows walking space on both sides and room for wardrobe doors and drawers to open. Measure the door swing too: at 180cm wide, this size can crowd a doorway a UK king would clear easily.
Is the Coolflex Essentials super king big enough for a family who co-sleep?
It's the best size for it in the range. At 180 x 200cm you get 90cm per adult, so a child wandering in at 3am costs you space rather than the whole night. The pocket springs also isolate movement, which helps when a small person fidgets between you.
How much bigger is a super king than a king in this mattress?
The UK super king is 30cm wider than the UK king, and both are the same 200cm length. All the extra goes into width, which is where sharing couples feel it. If your partner is restless, that 30cm is often the difference between noticing them and sleeping straight through.
Will the Coolflex Essentials super king get up my stairs?
It arrives vacuum-sealed and rolled, which makes stairs and landing turns far easier than a traditional super king would be. It expands within 24 hours of unpacking, so get it into the right room first. Once it's full size, moving 180cm of mattress around a tight landing is a two-person job.
Is the Coolflex Essentials super king good value for the size?
As an entry-level hybrid, it's one of the cheaper routes to a full 180 x 200cm bed with proper pocket springs. Compare the retailers listed on this page for the current price. Do budget for bedding too: super king sheets and a 260 x 220cm duvet cost more than their king equivalents.