Hypnos Ultimate Ortho Super King Mattress
The Hypnos Ultimate Ortho is an extra firm mattress built around Hypnos's ReActive 6-turn pocket springs, which means each spring responds independently to your body rather than the whole surface moving as one.
- Extra-firm for back & front sleepers
- Breathable, chemical-free cover
- Comfort layer keeps its shape
£999
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Hypnos Ultimate Ortho Mattress
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Mattress details
Mattress
Hypnos Ultimate Ortho Mattress
Size
Firmness
Extra Firm
Construction
Pocket Spring
Orthopaedic
Eco-Friendly
Depth (cm)
26
Layers
3
Layer Details
Cover
A 100% viscose, chemical-free cover that feels silky against the skin. It's breathable too, which helps air move away from your body overnight.
Comfort fillings
Natural cotton is combined with Solotex, a recycled fibre. The cotton regulates temperature while the Solotex adds resilience, so the comfort layer keeps its shape rather than flattening quickly.
Support system
Hypnos's ReActive 6-turn pocket spring system, engineered for total spinal and body support. Each spring works independently, sensing your comfort and support requirements, which means less roll-together and more even pressure relief.
Layer details from mattressnextday.co.uk product page, September 2026.
Key benefits
- 90cm each for two sharing: Each of you gets 90cm of width, so an elbow-flinging or duvet-rolling partner is simply too far away to wake you.
- Independent springs matter more at this width: The ReActive 6-turn pocket springs respond individually, which means one sleeper turning over barely registers on the other side of a bed this wide.
- Space for midnight visitors: If children pad in at 3am, or a large dog treats the bed as home, there's still a workable share of mattress for everyone.
- An extra firm surface that stays even: Cotton and Solotex fillings resist flattening, so across 180cm of width you shouldn't develop a dip on each person's habitual side.
- 30cm wider than a UK king, same length: The UK super king adds a noticeable 30cm of width over the UK king without asking any more of your room's length.
This size suits you if...
You share every night and want distance rather than compromise, you have a restless partner whose movement no comfort layer can fully hide, or your household regularly sleeps three or more once children or pets arrive. It also suits a large master bedroom or period property where a UK king would look slightly lost. Allow at least 3m x 2.9m of floor space.
Consider another size if...
Your bedroom is under our suggested 3m x 2.9m minimum, or your landing and door swing make a 180cm-wide mattress impossible to deliver. 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 room size do I need for the Hypnos Ultimate Ortho super king?
We suggest a minimum of 3m x 2.9m, and around 3.5m x 3.2m feels more comfortable, leaving space to walk both sides and open drawers. This is our guidance rather than the manufacturer's. If your room falls short, the UK king needs at least 2.7m x 2.9m by our reckoning and gives up only width, never length.
Is the Hypnos Ultimate Ortho UK super king good for couples with a restless partner?
Yes, and arguably better than any smaller size of this mattress. With 90cm each, most movement happens too far away to disturb you, and the ReActive 6-turn pocket springs work independently, so motion doesn't travel across the surface. The extra firm feel divides opinion, but at this width you each feel only your own side.
Will the Hypnos Ultimate Ortho super king fit up my stairs?
At 180 x 200cm this is the trickiest mainstream size to move. A pocket sprung, extra firm mattress like this one flexes far less than foam, so check your staircase width, landing turns and door swing before ordering. Measure the tightest corner, not the straight runs. If access is doubtful, the UK king is 30cm narrower and noticeably easier to manoeuvre.
Is a super king big enough for co-sleeping with children?
It's the best mainstream option for it. Two adults get 90cm each on the Hypnos Ultimate Ortho at this size, so a child wandering in still leaves everyone a reasonable share. The extra firm surface suits front and back sleepers who need solid support, though a very light child will sit on top of it rather than sink in.
How does the UK super king compare with the UK double for this mattress?
The UK super king is 45cm wider than the UK double and 10cm longer, which transforms it from a squeeze for two into genuine personal space. The mattress itself is identical: same extra firm feel, same springs and fillings. What changes is room requirement, since we suggest at least 2.6m x 2.8m for the UK double against 3m x 2.9m here.