Otty Extra Firm Hybrid Super King Mattress
The Otty Extra Firm Hybrid is a 25cm deep, double-sided mattress built for people who want serious support.
- Flippable, with two firmness levels
- Holds your spine level, no hammocking
- 100-night trial & 10-year guarantee
£749.99
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Otty Extra Firm Hybrid Mattress
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Mattress details
Mattress
Otty Extra Firm Hybrid Mattress
Size
Firmness
Extra Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
25
Layers
6
Layer Details
Double Sided Cover
A washable, double-sided cover in a thick 400g knit, which means a soft, plush feel against your skin. Being removable makes it far easier to keep clean over the years.
FlexFoam Layer
A high density, durable FlexFoam layer that delivers the firm support level. This is what gives the mattress its solid, planted feel rather than a soft initial sink.
Firm Encapsulated Pocket Springs
Large encapsulated pocket springs provide the firm rating, and because each spring moves independently, motion transfer is kept to a minimum. That means less disturbance when a partner turns over.
Side Supports
Thick foam borders around the perimeter give you an edge-to-edge sleep surface and help prevent rolling out of bed. Useful if you sit on the edge to get dressed.
High Density Support Foam
A layer of specially designed Reflex Foam sits above the springs to add comfort and extra support when the mattress is flipped to the firm side. It keeps that side supportive rather than punishing.
Bamboo & Charcoal Memory Foam
Bamboo and charcoal infused memory foam adds a touch of contouring comfort when the mattress is on the firm side. The infusion is there for its health benefits as well as feel.
Layer details from otty.com product page, September 2026.
Key benefits
- 90cm each for two sharing: Two people get 90cm each, which means a partner who shifts about all night is far enough away that you rarely feel it.
- Independent springs across a wide surface: Up to 2000 encapsulated pocket springs move individually, so at this width a turn on one side barely registers on the other.
- Usable edges matter more here: Thick foam side supports give an edge-to-edge sleep surface, so the full 180cm is genuinely sleepable rather than shrinking near the borders.
- Room for the household: When a child climbs in at 3am, everyone still keeps a workable share of the bed rather than someone retreating to the sofa.
- Two firmness levels in one big bed: The 9/10 and 10/10 flippable sides mean you can adjust the feel without replacing a mattress this large, which is no small saving of hassle.
This size suits you if...
You share the bed every night and a UK king still feels like a compromise, your partner is a genuinely restless sleeper and distance would do more for you than any comfort layer, or children and pets treat your bed as communal territory and you want firm support underneath all of it. A large master or period bedroom where a smaller bed would look lost is the natural home for it.
Consider another size if...
Your bedroom falls short of our suggested 3m x 2.9m minimum, or you sleep alone. We'd recommend the UK king instead: still 200cm long, 30cm narrower, and far easier to fit and dress.
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FAQ's
How much space does each person get on the Otty Extra Firm Hybrid super king?
Two people sharing get 90cm each. That is the width of a UK single per person, which is why this size suits couples where one of you sleeps restlessly. The edge-to-edge side supports mean you can use the full width too, rather than avoiding the perimeter.
Is the Otty Extra Firm Hybrid super king much bigger than the UK king?
It's 30cm wider: 180 x 200cm against the UK king's 150 x 200cm, with the same length. That extra width is the difference between sharing comfortably and sharing generously, and it's what makes room for a child or dog without anyone clinging to an edge.
Can you still flip the Otty Extra Firm Hybrid in a super king?
Yes, both sides remain usable, 9/10 firmness on one and 10/10 on the other. At 180 x 200cm it is a two-person job to turn, so recruit help and clear space around the bed first. Once flipped, the firmer side behaves exactly as it does in smaller sizes.
Is a super king a good idea for a very firm mattress?
Arguably the best pairing. An extra firm surface keeps a level, stable feel across the whole 180cm, so there's no roll-together in the middle, and the independent pocket springs limit motion transfer. If you chose this mattress for undisturbed sleep, the width finishes the job.
Does the Otty Extra Firm Hybrid super king suit families sharing with children or pets?
It's the size we'd point families towards. A 9/10 firmness holds its shape under extra, unevenly placed weight, so a child across the middle or a large dog at the foot doesn't create a dip. With 180cm of width, the adults still keep a proper share.