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.
- Extra width for one firm-surface sleeper: The UK small double is 30cm wider than the UK single, so a back or front sleeper can stretch out on this extra firm surface without hanging off the edge.
- Fits rooms a double would crowd: At 15cm narrower than the UK double, it suits box rooms, loft conversions and compact second bedrooms where walking space around the bed matters.
- Full-depth build in a compact footprint: You get the same 32cm deep construction of 1500 pocket springs and cotton fillings as the larger sizes, just in a frame a smaller room can take.
- Practical for a guest room: An occasional couple can share for a night or two, and the extra firm feel holds its shape well between visits rather than developing a settled dip.
- Standard 4ft bedding: Small double is a standard UK size, so fitted sheets and frames are easy to find, and a regular double duvet covers it comfortably.
This size suits you if...
You're a solo adult who finds most mattresses too soft and has outgrown a UK single, but your room can't spare the width of a full double. It also works if you're furnishing a guest room or holiday let where couples stay occasionally rather than nightly, or fitting a bed into a loft conversion where a bigger frame would leave no standing room.
Consider another size if...
You share the bed every night, since 120cm is snug for two, and doubly so on an extra firm surface where neither of you sinks in. We'd recommend the UK double instead, which gives 67.5cm each for two sharing; allow at least 2.6m x 2.8m.
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Is a small double big enough for the Relyon Ortho Superior Extra Firm 1500?
For one person, comfortably. The UK small double is 30cm wider than the UK single, which gives a solo back or front sleeper plenty of room on this extra firm surface. For a couple sharing every night it's tight, and firm mattresses expose that more because you lie on the surface rather than settling into it.
Will the small double Relyon Ortho Superior fit up a narrow staircase?
It needs thought. This mattress is delivered flat rather than rolled and boxed, and at 120 x 190cm and 32cm deep it's a substantial item to manoeuvre. Measure your stairwell, landing and door clearances before ordering, particularly for loft conversions or older properties with tight turns.
What room size do I need for a 4ft small double mattress?
We suggest at least 2.4m x 2.8m for the UK small double. That leaves enough space to walk around the bed and open drawers or a wardrobe. If your room is smaller than that, the UK single may be the more liveable choice; we suggest at least 2.1m x 2.8m for that size.
Can two adults sleep on the small double Relyon Ortho Superior occasionally?
Yes, for the odd night. The pocket springs work independently, so two people won't roll together, and the extra firm surface keeps its shape under a heavier combined load. For every-night sharing you'd feel the width, and the UK double or UK king would suit far better.
How do I compare prices on the small double Relyon Ortho Superior?
Use the price table on this page. The prices shown here are updated as retailers change them, so you're always seeing current figures for this exact size rather than a starting-from price for the range. Check delivery terms with the retailer directly, since this mattress arrives flat rather than boxed.