Hypnos Orthos Support 7 Firm King Size Mattress
The Hypnos Orthos Support 7 Firm is a pocket spring mattress built around Hypnos's ReActive 7-turn pocket springs, which flex individually so the mattress can follow the shape of your body rather than pushing back as one flat surface.
- Suits back & heavier sleepers
- Helps keep your spine level
- Minimises partner disturbance
£1,274.15
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Hypnos Orthos Support 7 Firm Mattress
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Mattress details
Mattress
Hypnos Orthos Support 7 Firm Mattress
Size
Firmness
Firm
Construction
Pocket Spring
Depth (cm)
Layers
6
Layer Details
British wool top layer
Two layers of British wool from Red Tractor-assured farms form the breathable top of the mattress. That helps air move through the surface, so it should feel less stuffy as you sleep.
Cotton layer
Two layers of responsibly sourced cotton sit inside the wool layers. They keep you cool and dry, which is helpful if you tend to warm up overnight.
eOlus recycled fibre comfort pad
An adaptive comfort pad made from eOlus recycled fibre sits above the springs. It adds a little cushioning between you and the firm spring core, though the overall feel stays firm.
ReActive 7-turn pocket spring core
The core is Hypnos's ReActive 7-turn pocket spring system, which gives targeted support. The springs work independently, so you get firm, even support and less movement carried across the bed to a partner.
Cotton layer
A second layer of responsibly sourced cotton sits beneath the springs. It mirrors the cotton above, so the mattress stays cool and dry from both sides.
British wool bottom layer
A breathable British wool layer forms the base. Because the mattress is flippable, you can turn it over to spread wear, and the wool underneath keeps the same airy feel.
Layer details from mattressman.co.uk and snug-interiors.com product pages, October 2026.
Key benefits
- 75cm each for couples: Two sharers get 75cm of width apiece, which means you can change position without negotiating for space or waking the person next to you.
- Less partner disturbance: The ReActive 7-turn pocket springs flex individually, so on a bed this wide one of you getting up early is far less likely to disturb the other.
- Extra length for taller sleepers: At 200cm long, the UK king adds 10cm over the UK double, a genuine relief if either of you is approaching six foot.
- Firm support across the full width: The firm pocket spring build keeps the surface level right across the 150cm width, so neither sleeper rolls towards the middle.
- Fits a typical master bedroom: We suggest a room of at least 2.7m x 2.9m, which most UK master bedrooms can manage where a UK super king would feel cramped.
This size suits you if...
You share the bed every night and a double leaves you brushing shoulders, or one of you keeps different hours and you want the springs and the extra width working together to keep movement from carrying across. It also suits couples where one partner is tall: the 200cm length is 10cm more than a UK double, and on a firm mattress your feet stay supported rather than hanging off the end.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest for a UK king. In that case we'd recommend the UK double instead, which needs at least 2.6m x 2.8m and gives up 15cm of width.
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FAQ's
Is a UK king big enough for a couple on a firm mattress?
Yes, for most couples. The UK king gives 75cm of width each for two people sharing, and because the Orthos Support 7 is firm with less sink, you use that width fully rather than drifting into a dip in the middle. Lightweight side sleepers may still find the tension itself unforgiving, whatever the size.
Does the UK king reduce partner disturbance on the Orthos Support 7?
It helps noticeably. The ReActive 7-turn pocket springs respond independently, so movement doesn't travel far through the mattress, and the 150cm width puts more distance between you in the first place. If one of you gets up hours before the other, the combination makes an early alarm much easier to sleep through.
What room size do I need for the Hypnos Orthos Support 7 in a UK king?
We suggest a room of at least 2.7m x 2.9m. That leaves walking space around the bed and room to open wardrobe doors, which matters in new build master bedrooms that shrink quickly once furniture goes in. If your room comfortably exceeds that, the UK super king is 30cm wider and needs at least 3m x 2.9m.
Is the UK king long enough for someone over six foot?
At 200cm, or 6ft 6in, the UK king gives most tall sleepers comfortable clearance, and it's 10cm longer than the UK double. On a firm mattress that length counts, since a stable surface is less forgiving of feet overhanging the end. Only the UK super king matches it for length, so you're already at the maximum here.
Should we choose the UK king or the UK super king in this mattress?
The UK king suits most couples: 75cm each is a clear step up from a double without demanding a large room. The UK super king is 30cm wider and the same length, but we suggest at least 3m x 2.9m for it. If a dog routinely claims part of the bed, that extra 30cm may justify the bigger room.