Hypnos Imperial Ortho Supreme Mattress
Mattress
Hypnos Imperial Ortho Supreme Mattress
Size
Firmness
Construction
Depth (cm)
28
Layers
5
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.
- Fits where other sizes won't: At 90cm wide, it leaves room for a desk, wardrobe or toy storage in a child's bedroom without the bed dominating the floor.
- Firm support for growing sleepers: The ReActive 7-turn pocket springs respond individually, which means a teenager or single adult gets proper spinal alignment rather than a saggy budget feel.
- A guest room that earns compliments: In a spare room or study that doubles as guest space, the natural wool and cotton fillings give visitors a noticeably better night than a typical spare bed.
- Cool for warm rooms: Wool insulates in winter and cotton wicks moisture in summer, useful in a small room or loft conversion where heat can build up.
- Cheap, easy bedding: Standard single sheets and a 135 x 200cm single duvet fit, and both are the most widely stocked bedding of any size.
This size suits you if...
You're buying for a teenager or single adult who needs firm, supportive sleep in a room where every centimetre matters, you're furnishing a guest room or a spare room that doubles as an office, or you've moved into a student room or first flat where the frame came supplied and the mattress didn't. It also suits a loft bedroom where only a narrow footprint fits under the slope.
Consider another size if...
You're an adult who spreads out in your sleep, or you simply have the space for something wider. The UK small double is 30cm wider at the same length, and we suggest at least 2.4m x 2.8m of floor space for it.
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What are the dimensions of the Hypnos Imperial Ortho Supreme single?
The UK single measures 90 x 190cm, which is 3ft x 6ft 3in. It's the standard one-person size in the UK, so it fits standard single frames, single sheets and a 135 x 200cm single duvet without any hunting for unusual bedding.
Is the Hypnos Imperial Ortho Supreme single suitable for a child?
The size is right, but the feel deserves thought. This is a firm mattress, and lightweight sleepers can find firm builds a little unyielding at the shoulder and hip. For an older child or teenager who sleeps mostly on their back it's a reasonable fit; for a young or very light child, a softer mattress may suit better.
Will the single fit a bunk bed or mid sleeper?
The 90 x 190cm footprint matches standard UK bunk and mid-sleeper frames. The catch is depth: at 28cm, this is a deep mattress, and many raised frames set a maximum depth so the guard rail still does its job. Measure from the base to the top of the rail before you buy.
How much room does a single mattress need?
We suggest allowing at least 2.1m x 2.8m of floor space for a UK single. That leaves a walkway alongside the bed and space for a wardrobe or desk. It's the most forgiving size in the range, which is why it works in box rooms, lofts and rooms where two beds share the space.
Is a UK single big enough for an adult?
For one average-sized adult, yes: 90cm of width is the UK standard for solo sleeping, and the firm pocket sprung support here suits back sleepers and heavier sleepers well. If you tend to sprawl, or you want space to turn freely, the UK small double gives you 30cm more width at the same length.