Komfi Unity Comfort Eco Foam Mattress
Mattress
Komfi Unity Comfort Eco Foam Mattress
Size
Firmness
Construction
Depth (cm)
14
Layers
2
Layer Details
- Comfort Layer. A high-density Reflex foam comfort layer, which means the surface responds to your shape while keeping a medium level of support. It's the part you'll feel first when you lie down.
- Support System. A sturdy core of Ecofoam, made from fully recycled materials, moulds to your body to encourage healthy posture. That contouring helps reduce tossing and turning through the night.
Layer details from mattressonline.co.uk product page, September 2026.
- The traditional couples' size: At 4ft 6in x 6ft 3in, the UK double has been Britain's standard shared bed for decades, giving two people 67.5cm each.
- Fits typical UK bedrooms: Allow at least 2.6m x 2.8m and you'll still have space for bedside tables on both sides, something a UK king often rules out.
- Slim profile, easier to move: At 14cm deep, this is a lighter mattress to carry than most doubles, a real advantage on the turning stairs of an older terrace.
- Greener without the price penalty: The Ecofoam core is made from fully recycled materials, so a budget double doesn't have to mean a compromise on environmental credentials.
- Bedding is cheap and everywhere: Double sheets and a 200 x 200cm double duvet are stocked at every price point, handy if you're furnishing a whole home at once.
This size suits you if...
You share the bed most nights and want the standard couples' size in a room where a UK king would feel cramped, you're kitting out a first flat or second bedroom on a tight budget and need the bed to leave space for a wardrobe and drawers, or you sleep alone but share the mattress with a dog or cat who claims a corner.
Consider another size if...
You and your partner both want real space to stretch out, or 67.5cm each sounds tight. We'd recommend the UK king instead: it's 15cm wider and 10cm longer, and we suggest a room of at least 2.7m x 2.9m.
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Is the Komfi Unity UK double big enough for two adults?
Yes, with a caveat. The UK double gives 67.5cm each for two people sharing, which is the long-standing UK standard for couples. Bear in mind this mattress is 14cm deep, slimmer than most, so two heavier adults sharing may find it lacking. Average-weight couples in a typical bedroom should be comfortable.
What room size do I need for the Komfi Unity in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That allows the door to open fully and leaves walking space around the bed. If your room is close to the minimum, measure with bedside tables in mind, as they're usually the first thing squeezed out.
How much bigger is the UK double than the UK small double?
The UK double is 15cm wider than the UK small double, and the two are the same length. That 15cm matters more than it sounds when two people share every night, as it's the difference between turning over freely and disturbing your partner. For a solo sleeper in a small room, the UK small double is often enough.
Will the UK double Komfi Unity get up narrow stairs?
It's better placed than most doubles. At 14cm deep it's slimmer and lighter than a typical sprung double, which makes it noticeably easier to angle around the tight turns of an older terrace staircase or a narrow new build landing. Measure your tightest corner first all the same, since 135 x 190cm is still a large item.
Does a UK double suit a solo sleeper?
Comfortably. On your own you get the full 135cm width to spread out, which also leaves room for a dog or cat who insists on their corner. Across owner feedback the Komfi Unity sleeps a little firmer than its stated medium, so lighter side sleepers should factor that in whatever size they choose.