Otty Extra Firm Hybrid 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
£469.99
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The Extra Firm Hybrid has an Otty rating of 9/10 on the firmness scale, with the other side firmer still at 10/10, so you can flip it to find the level that suits you. Inside there are up to 2000 encapsulated pocket springs beneath layers of FlexFoam and bamboo and charcoal infused memory foam, which means firm push-back with a little surface comfort rather than a hard, board-like feel. It comes in four UK sizes, and Otty backs it with a 100-night trial and a 10-year guarantee. It suits back and front sleepers best, although lightweight side sleepers will likely find it too firm.
Mattress specifications
Firmness
Extra Firm
Type
Hybrid
Depth (cm)
25
Number of Layers
6
Trial Period (nights)
100
Warranty (years)
10
Price Range
£469 to £750
Best Sleeping Position(s)
Stomach Sleeping
Certifications
Assessed from Otty's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
Choose this one if you have found softer hybrids let you sink too far. The high density FlexFoam and encapsulated pocket springs are built to hold your spine level, which means less of that hammock feeling if you are heavier or sleep on your back. Being flippable is genuinely unusual: you get two firmness levels, 9/10 and 10/10, in one purchase. Thick foam side supports give you a usable edge-to-edge sleep surface, handy if you share a bed and end up near the sides. Free two-man delivery comes as standard, with room of choice and old mattress removal available at checkout for an extra fee. The 100-night trial takes some of the risk out of going this firm.
Key features & 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.
Best suited for?
Back sleepers
High density FlexFoam and encapsulated pocket springs are built to hold the spine level, which means less of that hammock feeling when lying on your back.
Front sleepers
A 9/10 firmness with firm push-back and only a little surface comfort keeps your middle from sinking too far, so you stay level lying face down.
Heavier sleepers
Large encapsulated pocket springs under dense foam give firm support, so you are less likely to sink into the sort of hammock dip softer hybrids can create.
Couples
Each pocket spring moves independently, which keeps motion transfer low, and thick foam side supports give a usable edge-to-edge surface if you share a bed.
If you sleep on your side, particularly if you are lighter in build, a 9/10 firmness will likely feel too hard on your shoulders and hips. Anyone who loves a plush, cradling feel should look elsewhere too: this mattress is deliberately built firm on both sides, so there is no soft option to flip to.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Otty Extra Firm Hybrid Mattress
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FAQ's
How firm is the Otty Extra Firm Hybrid mattress?
Otty rates it as extra firm at 9/10 on the firmness scale. It is also flippable, with the other side rated firmer still at 10/10, so you can choose between two very firm feels rather than one.
Does the Otty Extra Firm Hybrid come with a trial and guarantee?
Yes. Otty offers a 100-night trial, which gives you a proper stretch of time to adjust to the firmer feel, plus a 10-year guarantee for longer-term peace of mind.
How many springs does the Otty Extra Firm Hybrid have?
Otty states the mattress contains up to 2000 encapsulated pocket springs, so the exact count varies by size. Encapsulated springs move independently, which helps limit motion transfer between you and a partner.
What sizes does the Otty Extra Firm Hybrid come in?
It is available in UK Single, Double, King and Super King. All sizes are 25cm deep.
Is delivery free on the Otty Extra Firm Hybrid?
Yes, premium two-man delivery is free as standard. Room of choice delivery and old mattress removal are available at checkout for an extra fee, which is handy if you can't manage the lifting yourself.
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