Hypnos Imperial Ortho Supreme Mattress
The Hypnos Imperial Ortho Supreme is a firm pocket sprung mattress from Hypnos, an NBF-approved manufacturer.
- Firm feel for back & heavier sleepers
- Helps keep your spine aligned
- Wool & cotton regulate temperature
£879
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At 28cm deep, the Hypnos Imperial Ortho Supreme pairs ReActive 7-turn pocket springs with natural fillings: RWS certified British wool, sustainably sourced cotton and eOlus fibres, all under an unbleached cotton cover that meets fire safety standards without FR chemicals. It comes with a 10-year manufacturer's guarantee from Hypnos and is available in nine sizes, from UK Single up to Emperor, plus EU sizes. If you want firm support with natural, breathable materials rather than foam, this is the sort of build to shortlist.
Mattress specifications
Firmness
Firm
Type
Pocket Spring
Depth (cm)
28
Number of Layers
5
Trial Period (nights)
Warranty (years)
10
Price Range
£879 to £1,929
Best Sleeping Position(s)
Back Sleeping
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?
This mattress makes sense if you want proper firm support without synthetic foams. The ReActive 7-turn pocket springs respond individually, which means your hips and shoulders get targeted support while your spine stays aligned as you shift position. The wool and cotton fillings handle temperature well: wool insulates in winter, cotton wicks moisture in summer, so hot sleepers should find it more forgiving than memory foam. The materials are credibly certified too, with Responsible Wool Standard wool and an unbleached cotton cover that's fire-resistant without chemical treatments. Yes, it's a serious spend, but the natural build and 10-year Hypnos guarantee help justify it. Best suited to back sleepers and heavier sleepers who need a firmer feel.
Key features & layer details
Cover
An unbleached cotton cover that achieves fire resistance without FR chemicals, which means a cleaner, fresher sleep surface. It feels natural rather than synthetic against your bedding.
eOlus™ Fibres
Resilient eOlus fibres sit just beneath the cover, offering body support while letting air and moisture pass through easily. In practice, that means less heat building up around you overnight.
RWS Certified British Wool
Layers of British wool, certified by the Responsible Wool Standard, cushion your whole body so you dip into the surface just the right amount. Wool also insulates naturally, keeping you warmer in winter.
Sustainably Sourced Cotton
Responsibly sourced cotton wicks away excess moisture, which means the surface stays feeling fresh through the night. It works alongside the wool to regulate temperature all year round.
ReActive™ 7-Turn Pocket Springs
A support unit of ReActive 7-turn pocket springs, each moving independently to align your spine as you change position. That translates to targeted support at your hips and shoulders rather than a one-feel-fits-all base.
Layer details from mattressnextday.co.uk product page, September 2026.
Best suited for?
Back sleepers
The firm feel and individually moving pocket springs give targeted support at hips and shoulders, which means your spine stays aligned while you lie flat.
Heavier sleepers
Firm support from ReActive 7-turn pocket springs, backed by wool and cotton layers, gives a supportive feel that suits those who need a firmer surface.
Warm sleepers
Cotton wicks away moisture and eOlus fibres let air pass through, which means less heat builds up than you would expect from memory foam.
Eco-conscious buyers
Responsible Wool Standard British wool, sustainably sourced cotton and an unbleached cover without FR chemicals make this a natural, foam-free build.
Combination sleepers
Each spring moves independently to realign your spine as you change position, so support follows you whenever you turn during the night.
This is a firm mattress, so lightweight side sleepers may find it a little too unyielding at the shoulder and hip. If you prefer the slow, cradling sink of memory foam, the springy natural feel here won't suit you. And with a premium starting price, budget shoppers should look elsewhere.
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 Imperial Ortho Supreme Mattress
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FAQ's
How firm is the Hypnos Imperial Ortho Supreme mattress?
It's rated firm. That suits back sleepers and heavier sleepers who need solid spinal support, although lightweight side sleepers may find it a little too unforgiving at pressure points like the shoulders.
Does the Hypnos Imperial Ortho Supreme have a guarantee?
Yes, it comes with a 10-year Hypnos guarantee, which is the manufacturer's own guarantee rather than a retailer offer. No trial period is stated on the retailer listing we sourced, so check terms with your chosen retailer before buying.
Is the Hypnos Imperial Ortho Supreme good for hot sleepers?
It should cope well. The wool and cotton fillings regulate temperature naturally, the cotton wicks moisture and the eOlus fibre layer lets air pass through easily. There's no memory foam to trap heat, which is often the main culprit for sleeping hot.
What sizes does the Hypnos Imperial Ortho Supreme come in?
Nine sizes: UK Single, Small Double, Double, King, Super King and Emperor, plus EU Single, Double and King.
How deep is the Hypnos Imperial Ortho Supreme mattress?
It's 28cm deep, so standard fitted sheets should still work, though deep-fitted sheets will give you an easier fit. It's delivered flat rather than rolled, according to MattressNextDay's listing, which also offers free next-day delivery as a retailer perk.
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