Komfi Unity Comfort Ortho Double Mattress in a Box
The Komfi Unity Comfort Ortho is a budget boxed mattress in five UK sizes, from small single up to king.
- Firm support for back & front sleepers
- Memory foam that moulds to you
- Removable cover washes in the machine
£201.86
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Komfi Unity Comfort Ortho Mattress in a Box
More available sizes
Mattress details
Mattress
Komfi Unity Comfort Ortho Mattress in a Box
Size
Firmness
Firm
Construction
Rolled
Orthopaedic
Depth (cm)
Layers
2
Layer Details
Memory foam
A 3cm memory foam layer designed to react to your body heat and mould to your contours. It gives the firm feel a little cushioning at the surface.
Ecofoam
A 17cm base of Ecofoam, made from 100% recycled foam, designed to give firm yet comfortable support. It does most of the work in holding you up, and it's why the mattress feels firm overall.
Layer details from archerssleepcentre.co.uk and aworldoffurniture.co.uk product pages, October 2026.
Key benefits
- The standard couples' size: At 135 x 190cm, the UK double is the long-established size for two sharing, which means it fits the bed frames and bedding most UK homes already have.
- 67.5cm each when sharing: Two people get 67.5cm each across the width, enough for most couples who sleep reasonably close, although restless sleepers may feel the limit.
- Fits most UK bedrooms: We suggest a room of at least 2.6m x 2.8m, which leaves space for a wardrobe and drawers in a typical second bedroom or first flat.
- Arrives boxed: Because it's compressed into a box, it goes up the turning stairs of an older terrace or a tight new build landing far more easily than a rigid mattress.
- Budget-friendly at a shared size: Doubles are usually where budgets get stretched, so a low-priced option in this size helps if you're kitting out a whole home at once.
This size suits you if...
You're a couple in a typical UK bedroom and want the standard shared size without overspending, or you're setting up a first flat or second bedroom where the bed has to share space with a wardrobe and drawers. It also suits a guest room that hosts visiting couples, where a cheap, no-fuss double makes more sense than something expensive that's slept on a few weeks a year.
Consider another size if...
Your room is under our suggested 2.6m x 2.8m minimum, or you both want more personal space than 67.5cm each. For small rooms we'd recommend the UK small double, which is 15cm narrower and needs at least 2.4m x 2.8m.
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FAQ's
Is the Komfi Unity Comfort Ortho double big enough for two adults?
For most couples, yes. The UK double gives 67.5cm each for two people sharing, which works if you sleep fairly close. If one of you is broad-shouldered or restless, sizing up to the UK king adds 15cm of width and 10cm of length, though it needs a room of at least 2.7m x 2.9m.
What room size do I need for the Komfi Unity Comfort Ortho in a UK double?
We suggest at least 2.6m x 2.8m. That allows walking space around the bed and room for bedside tables on both sides, which is usually the first thing to go in a tight room. Measure with your other furniture in mind, since a wardrobe and chest of drawers eat floor space quickly.
Will the boxed double fit up narrow stairs?
Almost certainly. The mattress arrives compressed and rolled in a box, so the awkward turns in older terraces and the tight landings of new builds are far less of a problem than they would be with a full-sized 135 x 190cm mattress. Once unboxed in the bedroom, it expands to its full dimensions.
Is the UK double of this mattress good for a guest room?
It's a sensible match. A guest double accommodates visiting couples as well as solo guests, and at this budget price you're not tying up money in a bed that's used occasionally. Standard double sheets and duvets are cheap and stocked everywhere, which keeps the whole setup low-cost.
Should I get the Komfi Unity Comfort Ortho in a double or a king?
The UK double suits most shared bedrooms: the UK king is 15cm wider and 10cm longer, which is welcome if you have the space but can dominate a smaller room. We suggest at least 2.7m x 2.9m for the UK king, against 2.6m x 2.8m for the UK double, so measure before deciding.