Hypnos Ultimate Ortho 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
£529
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The Hypnos Ultimate Ortho's fillings are natural cotton with Solotex, a recycled fibre, under a silky 100% viscose cover. It's 26cm deep and sits in the accessible end of the Hypnos range. Hypnos is an NBF-Approved manufacturer, and this model carries a Hypnos 10-year guarantee. Be clear on the firmness before you buy: extra firm suits those who genuinely want a very solid feel, not everyone does.
Mattress specifications
Firmness
Extra Firm
Type
Pocket Spring
Depth (cm)
26
Number of Layers
3
Trial Period (nights)
Warranty (years)
10
Price Range
£529 to £1,299
Best Sleeping Position(s)
Stomach Sleeping
Certifications
BS 7177
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
Choose this if you want a properly firm mattress from an established British maker without the usual Hypnos price tag. The ReActive 6-turn pocket springs sense comfort and support requirements individually, which means better spinal alignment for back and front sleepers who need a solid base. The cotton fillings help regulate temperature, useful if you tend to sleep warm, and the chemical-free viscose cover is breathable rather than clammy. Sizing is unusually generous, running from a UK Small Single up to an Emperor, plus EU sizes, so awkward bed frames are catered for. The manufacturer's 10-year guarantee adds reassurance, and Mattress Next Day offers free next day delivery.
Key features & 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.
Best suited for?
Back sleepers
The ReActive 6-turn pocket springs work independently to sense support needs, which gives a solid, even base that keeps your spine well supported.
Front sleepers
Extra firm feel and individually working pocket springs mean your hips are held up rather than sinking in, which suits lying on your front.
Warm sleepers
Natural cotton fillings regulate temperature and the breathable viscose cover lets air move away from your body, so the bed feels less clammy overnight.
European bed frames
Sizes run from a UK Small Single up to an Emperor, plus EU sizes, so awkward or continental frames are catered for.
Heavier sleepers
Solotex, a recycled fibre, adds resilience to the comfort layer, so it keeps its shape rather than flattening quickly under a firm, supportive feel.
This is an extra firm mattress, so lightweight sleepers and dedicated side sleepers may find it too unyielding, with not enough give at the shoulder and hip. If you like a cushioned, sink-in feel, look elsewhere. The listing also gives no trial period, so you'll want to be confident in your choice before ordering.
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.
Hypnos Ultimate Ortho Mattress
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FAQ's
How firm is the Hypnos Ultimate Ortho mattress?
It's rated extra firm, the most solid end of the scale. That suits heavier builds and back or front sleepers who want strong spinal support, although lightweight side sleepers will likely find it too hard for comfortable pressure relief at the shoulders and hips.
Does the Hypnos Ultimate Ortho have a guarantee?
Yes, it comes with a Hypnos 10-year guarantee from the manufacturer, as stated on the Mattress Next Day listing. Note that the free next day delivery and old mattress removal are that retailer's own offers rather than Hypnos services.
How many springs are in the Hypnos Ultimate Ortho?
The listing doesn't give a spring count. What it does confirm is the support system: Hypnos's ReActive 6-turn pocket springs, where each spring moves independently to respond to your body, giving even support and reducing motion transfer between partners.
What sizes does the Hypnos Ultimate Ortho come in?
The range is broad: UK Small Single, Single, Small Double, Double, King, Super King and Emperor, plus EU Single, EU Double and EU King.
Is the Hypnos Ultimate Ortho good for hot sleepers?
It should cope reasonably well. The fillings are natural cotton, which regulates temperature, and the 100% viscose cover is breathable. There's no memory foam layer listed, which is often the culprit for heat retention, so warm sleepers have less to worry about here.
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