Relyon Ortho Superior Extra Firm 1500 Mattress
Mattress
Relyon Ortho Superior Extra Firm 1500 Mattress
Size
Firmness
Extra Firm
Construction
Depth (cm)
32
Layers
3
Layer Details
- Belgian Damask Viscose Sleep Surface. A silky, breathable damask cover that lets air move through the sleep surface. In practice, this means a fresher, less clammy feel through the night.
- Cotton. A natural filling that helps regulate body temperature, so you're less likely to wake up too warm. It also adds a layer of support and natural comfort above the springs.
- 1500 Pocket Springs. Each of the 1500 springs sits in its own fabric pocket, working independently of its neighbours. This means the mattress contours to your body and relieves pressure rather than moving as a single unit.
Layer details from mattressnextday.co.uk product page, September 2026.
- A compact footprint for tight rooms: At 90cm wide it leaves floor space free for a desk or wardrobe, which matters in box rooms, student lets and lofts where the bed must sit against one wall.
- Full support at the smallest size: You get the same 1500 pocket springs as the larger sizes, which means a solo sleeper gets independent support across the whole 90cm width rather than a cut-down build.
- The easiest size to move in flat: This mattress arrives flat rather than rolled, and the UK single is the most manageable size to carry up narrow stairs or round a tight landing.
- Extra firm support for a spare room: Guests who sleep on their back or front get a properly solid surface, and the cotton fillings help the bed stay fresh between visits.
- Simple, cheap bedding: Standard single sheets and a 135 x 200cm single duvet fit, and both are the most widely stocked and affordable bedding of any UK size.
This size suits you if...
You sleep alone, prefer a genuinely hard surface, and want the smallest standard footprint, perhaps for a spare room that doubles as an office or a first flat where the frame is provided but the mattress isn't. It also suits a heavier teenager who needs firm support, provided they sleep on their back or front rather than their side.
Consider another size if...
You share the bed, or you're an adult who spreads out and finds 90cm restrictive. We'd recommend the UK double instead, which is 45cm wider, gives 67.5cm each for two sharing, and needs a room of at least 2.6m x 2.8m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
Is the Relyon Ortho Superior Extra Firm 1500 single suitable for a child?
We'd be cautious. Extra firm really does mean extra firm here, and lighter bodies, children especially, may not press into the springs enough to feel any contouring. A heavier teen who sleeps on their back or front is a better match. For a younger child, a softer single from another range would serve them better.
Will the Relyon Ortho Superior single fit a bunk bed or mid sleeper?
The 90 x 190cm footprint matches standard UK bunk frames, but the depth is the problem. At 32cm this mattress is deep for a raised frame, and on a top bunk it could sit above the safety rail. Check your frame's maximum mattress depth before buying; most bunks specify something considerably shallower.
Is a UK single big enough for an adult on this mattress?
For most solo adults, yes. At 90 x 190cm it's the standard UK one-person size, and the full 1500 pocket springs support you edge to edge. If you're notably tall, bear in mind the 190cm length; the UK king of this mattress is 10cm longer, though it's a much bigger footprint overall.
What size room do I need for the UK single Relyon Ortho?
We suggest allowing at least 2.1m x 2.8m of floor space, which is our own guidance rather than Relyon's. That leaves room to walk alongside the bed and open drawers or a wardrobe. It's the smallest room requirement of any size this mattress comes in, which is why it suits box rooms and loft conversions.
Can the Relyon Ortho single be delivered up narrow stairs?
It's delivered flat rather than rolled and boxed, so it won't bend round corners the way a boxed mattress does. That said, the UK single is the easiest size of this mattress to manoeuvre, and a 90cm width clears most staircases. Measure any tight turns or low landings first, since the mattress is a rigid 32cm deep.