Komfi Unity Memory Small Double Mattress in a Box
The Komfi Unity Memory Mattress in a Box has a Neuform memory foam top layer that gently contours your body, which means you get a cushioned, shaped feel in a 19cm foam mattress.
- Contouring memory foam top layer
- Even head-to-toe support
- Removable washable cover
£271.17
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Komfi Unity Memory Mattress in a Box
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Mattress details
Mattress
Komfi Unity Memory Mattress in a Box
Size
Firmness
Construction
Eco-Friendly
Foam
Memory Foam
Rolled
Depth (cm)
19
Layers
3
Layer Details
Neuform memory foam
A memory foam top layer that Komfi says gently contours your body shape, which means it should cushion you and follow your outline as you lie down.
Reflex foam
A soft Reflex foam layer for gentle head-to-toe, edge-to-edge support, which means the support should feel even across the whole mattress.
Ecofoam base core
The Ecofoam base forms the core of the mattress and, Komfi says, has a reduced carbon footprint, so it gives the layers above a foundation with a lighter environmental impact.
Layer details from komfi.com product page, October 2026.
Key benefits
- Room to stretch out alone: The UK small double is 30cm wider than the UK single, which means a solo sleeper can turn over or sprawl without ending up near the edge.
- Fits rooms a double would crowd: Being 15cm narrower than the UK double, it can leave enough floor to open a wardrobe or get past the bed in a tight room.
- A sensible step up for a teenager: If your teenager has outgrown a single but their bedroom can't give up much floor, the UK small double adds width while keeping the same length.
- Workable under a sloping loft ceiling: In a loft conversion where headroom drops beside the bed, the narrower footprint makes it easier to keep the side you climb out of where you can stand up.
- Easy to dress: Small double (4ft) fitted sheets are widely sold in the UK, and a standard double duvet covers it comfortably.
This size suits you if...
You sleep alone and like to spread out, your bedroom is compact or has a sloping ceiling, or you're furnishing a spare room where couples stay only occasionally.
Consider another size if...
You share the bed every night and want room to move without disturbing each other. 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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FAQ's
Is the Komfi Unity Memory small double big enough for two people?
For occasional stays, yes, and many guest rooms use a UK small double for exactly that. For a couple sharing every night it's on the snug side, particularly as memory foam lets you sink in rather than move freely. The UK double gives 67.5cm each for two sharing and suits nightly couples better.
What size room do I need for a Komfi Unity Memory small double?
We suggest allowing at least 2.4m x 2.8m for a UK small double. That leaves space to walk around the bed and open doors or drawers. If your room is smaller than this, the UK single needs at least 2.1m x 2.8m by our guidance.
What sheets and duvet fit a small double Komfi Unity Memory?
Look for small double or 4ft fitted sheets, which are standard in UK shops. A standard double duvet works well on top. Because the mattress is 19cm deep, most fitted sheets will tuck under without strain, though check the pocket depth on the packet.
How much wider is a small double than a single mattress?
A UK small double is 30cm wider than a UK single, and both are the same length. For one adult or a growing teenager, that extra width is the difference between lying still and being able to roll over freely.
Is the Komfi Unity Memory long enough for a tall person in a small double?
The UK small double is 190cm long, or 6ft 3in, which is standard UK length. If you're tall and your feet already reach the end of the bed, the UK king is 10cm longer, although it's also 30cm wider and needs at least 2.7m x 2.9m.