Komfi Vitality Max Small Double Mattress in a Box
The Komfi Vitality Max Mattress in a Box has a Maxcool breathable top layer built to move air and regulate temperature, which means you should find it easier to stay comfortable if you tend to overheat.
- Cooling layer helps you sleep cooler
- Medium feel suits most sleepers
- Removable cover that washes easily
£388.20
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Komfi Vitality Max Mattress in a Box
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Mattress details
Mattress
Komfi Vitality Max Mattress in a Box
Size
Firmness
Medium
Construction
Foam
Rolled
Depth (cm)
30
Layers
3
Layer Details
Next Gen 4G Maxcool Layer
A breathable layer engineered to maximise airflow and regulate body temperature. It should help you avoid overheating through the night.
Ultra Soft Touch Layer
A cushioned layer that supports comfort and spinal alignment. It adds a softer feel under you without losing support.
Responsive Support Layer
A base layer that provides balanced support and maintains body positioning. It keeps you held evenly and stops the softer layers above from sinking too far.
Layer details from bedsonlegs.co.uk product page, October 2026.
Key benefits
- Space to sprawl on your own: At 30cm wider than a UK single, you can turn and stretch freely, and the medium foam cushions you in whichever position you end up.
- Kinder to a compact floor plan: Being 15cm narrower than a UK double, it can leave enough clearance for a door to swing open or a wardrobe to be reached in a tighter room.
- Helpful if small rooms run warm: Small bedrooms can feel stuffy overnight, and the breathable top layer is designed to move air, which may help if you tend to wake up too hot.
- Generous duvet overhang for one: Small double fitted sheets fit it, and a standard double duvet gives a single sleeper plenty of spare width to wrap up in.
- Fine for guests who stay a weekend: Two people can share for a short visit, although for nightly sharing the UK double's 67.5cm each would feel noticeably roomier.
This size suits you if...
You sleep alone but want proper room to spread out, or your bedroom is too compact for a UK double and couples only stay over occasionally.
Consider another size if...
You share the bed every night and both want space to move without disturbing each other. We'd recommend the UK double instead, which gives 67.5cm each; allow at least 2.6m x 2.8m for it.
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FAQ's
Is a Komfi Vitality Max small double big enough for two people?
For the odd weekend, yes, most couples manage comfortably. Sharing every night is a different matter. The UK double gives 67.5cm each and the UK king 75cm each, so if you sleep together nightly, either of those will feel far less cramped, especially as the foam's medium feel lets you sink in slightly towards each other.
What size room do I need for a Komfi Vitality Max small double?
We suggest at least 2.4m x 2.8m. Before ordering, measure where the door swings and where any bedside table would sit, because in a box room those few centimetres often decide whether the bed fits well or simply fits. For a UK double, we'd allow at least 2.6m x 2.8m.
Will a small double fit better than a double in a loft conversion?
Often, yes. Sloping ceilings tend to leave a narrow strip of full head height down the middle of the room. A UK small double is 15cm narrower than a UK double, so you can keep the bed further from the low side and still have room to stand and get in and out comfortably.
Is a small double a good upgrade for a teenager who has outgrown a single?
It's a sensible step up. A UK small double is 30cm wider than a UK single but the same length, so it adds width without pushing further into the room. If your teenager is already very tall, though, the extra 10cm of length on a UK king may matter more than width.
What bedding do I need for the Komfi Vitality Max small double?
Look for small double (4ft) fitted sheets with a pocket deep enough for the mattress's 30cm depth. A standard double duvet works well and gives a solo sleeper a little extra overhang. For the mattress itself, compare the retailers listed on this page, as prices are updated regularly.