Hypnos Ultimate Ortho Single 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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Hypnos Ultimate Ortho Mattress
More available sizes
Mattress details
Mattress
Hypnos Ultimate Ortho Mattress
Size
Firmness
Extra Firm
Construction
Pocket Spring
Orthopaedic
Eco-Friendly
Depth (cm)
26
Layers
3
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.
Key benefits
- Fits almost any room: At 90cm wide it needs floor space of just 2.1m x 2.8m by our guidance, so a desk or wardrobe can still fit alongside.
- Solid support for one: The ReActive 6-turn pocket springs respond to a single sleeper's weight individually, which means even spinal support with no partner compromises to make.
- Suits raised frames: At 26cm deep it works in most bunk, cabin and mid-sleeper frames, although you should check the guard rail clears the mattress top.
- Cool for small rooms: Natural cotton fillings and a breathable viscose cover move heat away, useful in box rooms and loft spaces that warm up quickly.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm duvet fit, the most widely stocked bedding of any UK size.
This size suits you if...
You're a solo adult sleeper who wants a genuinely firm surface, you're furnishing a guest room or spare room that doubles as an office, or you're buying for a heavier teenager who needs proper back support. It also fits the common situation of two beds in one shared room, where the 90cm width leaves a walkway between them.
Consider another size if...
You share the bed, or you're a broad-shouldered adult who feels hemmed in at 90cm wide. We'd recommend the UK double instead, which is 45cm wider and the same length; allow at least 2.6m x 2.8m of floor space for it.
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FAQ's
What are the dimensions of the Hypnos Ultimate Ortho single?
The UK single measures 90 x 190cm, or 3ft x 6ft 3in. We suggest a room of at least 2.1m x 2.8m, which leaves space to walk around the bed and open drawers or a wardrobe. That's our own guidance rather than the manufacturer's, so treat it as a sensible minimum.
Is the Hypnos Ultimate Ortho single a good choice for a child's room?
The size is right, since the UK single is the standard for children's beds, but the feel needs thought. This is an extra firm mattress, and lightweight children may find it too unyielding to sink into at all. For a heavier teen who sleeps on their back or front, it's a stronger fit.
Will the Hypnos Ultimate Ortho single fit a bunk bed or mid sleeper?
The 90 x 190cm footprint matches standard UK bunk and mid-sleeper frames. The mattress is 26cm deep, which is on the taller side for raised frames, so measure the gap between the base and the top of the guard rail before ordering. Safety guidance for bunks generally wants the rail comfortably above the mattress surface.
Is the single the same length as the double?
Yes. The UK single is the same length as the UK double at 190cm; the difference is width, with the UK single 45cm narrower. If a sleeper is tall, sizing up to the UK double won't buy extra legroom, only elbow room. The UK king is 10cm longer, if length is the real problem.
Where can I compare prices on the single Hypnos Ultimate Ortho?
Prices change often, so we don't print them here. The live table on this page shows current UK single prices and is updated as retailers change theirs, which makes it the most reliable place to check before you buy.