Hypnos Natural Sanctuary Ortho Mattress
Mattress
Hypnos Natural Sanctuary Ortho Mattress
Size
Firmness
Construction
Depth (cm)
28
Layers
4
Layer Details
- Viscose Blend Breathable Sleep Surface. A soft viscose blend cover that promotes airflow, which means the sleep surface stays cooler and fresher through the night. It is the first thing you'll feel, and it softens the firm feel slightly.
- eOlus™ Fibres. These fibres offer resilient body support while letting air and moisture pass through easily. In practice, that means cushioning that springs back rather than trapping heat the way dense foam can.
- Sustainably Sourced Cotton. Natural cotton fibres are highly breathable and wick away excess moisture. If you're a hot sleeper, this is the layer doing much of the quiet work.
- ReActive™ 7-Turn Pocket Springs. Hypnos's ReActive 7-turn pocket spring system uses 1200 individually responsive springs that work independently to adapt to your body's shape. That means support that follows your spine rather than pushing back as one flat unit, and less motion transfer between partners.
Layer details from mattressnextday.co.uk product page, September 2026.
- Space plus spring isolation: The independent pocket springs reduce movement across the bed, and at 90cm each for two people sharing, a restless partner mostly stops being your problem.
- Room for company: Children who wander in at 3am, or a large dog with fixed habits, can be absorbed without anyone ending up clinging to an edge.
- Firm support across the full width: The firm, no-sink feel stays consistent edge to edge, so back and front sleepers get proper support wherever they end up on 180cm of surface.
- Breathable at scale: Two people, possibly a child, on one mattress generates heat, and the cotton and eOlus fibre fillings help moisture escape rather than build up.
- Measure before you buy: Allow at least 3m x 2.9m of floor space, and check door swings and landing turns, as a 180 x 200cm mattress is awkward on tight stairs.
This size suits you if...
You share the bed every night and one of you sleeps restlessly, so distance matters as much as the spring count. Or your household routinely grows overnight, with children or a large dog treating your bed as theirs, and a UK king no longer stretches far enough. You'll also need a genuinely large master bedroom, comfortably clearing our suggested 3m x 2.9m minimum.
Consider another size if...
Your room falls short of our suggested 3m x 2.9m minimum, or you sleep alone. We'd recommend the UK king instead: it's 30cm narrower and the same length, and we suggest at least 2.7m x 2.9m for it.
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Is a super king Hypnos Natural Sanctuary Ortho too big for my bedroom?
Measure first. We suggest at least 3m x 2.9m of floor space for a UK super king, and that's a minimum rather than a comfortable fit. You still need to walk round the bed, open wardrobes and clear the door swing. If your room is smaller, the UK king needs at least 2.7m x 2.9m and is the same length.
Is the Hypnos Natural Sanctuary Ortho super king good for couples with a restless partner?
It's a strong match. The 1200 pocket springs move independently, so turning over transmits less movement across the bed, and the 6ft width means 90cm each for two people sharing. Distance does what no comfort layer can. One caution: it's a firm mattress, so a lightweight side sleeper in the pair may find it a little unyielding.
How much wider is a UK super king than a UK king?
The UK super king is 30cm wider than the UK king, and the two are the same length at 200cm. That extra width is the difference between sharing comfortably and sharing tolerably, especially if children or pets join you at night. You'll need super king bedding and a bigger room, so weigh the upgrade against your floor space.
Will the super king Hypnos Natural Sanctuary Ortho fit up my stairs?
At 180 x 200cm, this is the trickiest standard size to move. Pocket sprung mattresses shouldn't be bent or folded, so check your staircase, landing turns and bedroom door before ordering. In older properties with tight turns, some buyers find the UK king manageable where the UK super king isn't, so measure the route as carefully as the room.
Where can I buy the Hypnos Natural Sanctuary Ortho in a super king?
Availability shifts, so the most reliable answer is the live comparison table on this page, where prices are updated as retailers change them. Larger sizes like the UK super king sometimes appear at fewer retailers than the UK double or UK king, so if you see the size in stock at a price you're happy with, it's worth acting on.