Komfi Vitality Excel Small Double Mattress in a Box
The Komfi Vitality Excel Mattress in a Box has four foam layers over a firm Responsive Support Core, which means you get push-back support under your shoulders, hips and lower back without any springs.
- Firm feel with push-back support
- Memory foam eases tension at hips
- Washable cover for easy care
£332.96
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Komfi Vitality Excel Mattress in a Box
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Mattress details
Mattress
Komfi Vitality Excel Mattress in a Box
Size
Firmness
Construction
Eco-Friendly
Foam
Memory Foam
Rolled
Depth (cm)
25
Layers
4
Layer Details
Neufoam memory foam comfort layer
A memory foam layer set below the outer cover that adapts to your body's shape. That eases tension around your joints and hips.
Breathable high-density foam layer
A high-density foam that promotes airflow. It helps keep the sleeping surface fresh and temperature-regulated.
Responsive Support Core
A firm foam layer that cushions pressure points like shoulders, hips and lower back. It keeps push-back support so you don't sink too far.
Ecofoam foundation
A high-density base made from 100% recycled foam offcuts. It gives the mattress a stable footing while reducing its carbon impact.
Layer details from komfi.com product page, October 2026.
Key benefits
- Room to spread out alone: The UK small double is 30cm wider than the UK single, which means a solo sleeper can turn over or sprawl without an arm dropping off the edge.
- Fits tighter rooms: It's 15cm narrower than the UK double, so in a box room or loft conversion that difference can be what lets a door or wardrobe open properly.
- Same length as a single: Moving up from a UK single costs no extra length, which means the bed sits in the same position along the wall and only the width changes.
- Firm support across the whole surface: The firm Responsive Support Core holds its shape across the full 120cm width, so a back sleeper lying slightly off centre still gets consistent push-back.
- Practical for guest rooms: The removable, washable cover makes it easier to freshen up a UK small double between visitors in a guest room or holiday let.
This size suits you if...
You sleep alone and want more width than a single without giving up floor space, or you're furnishing a compact guest room or loft conversion where couples stay occasionally. It also suits a teenager who has outgrown a single but whose bedroom can't take a standard double.
Consider another size if...
You share a bed every night, or you want more width for two. We'd recommend the UK double instead; we suggest at least 2.6m x 2.8m for the UK double.
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FAQ's
Is the Komfi Vitality Excel UK small double big enough for two people?
For occasional stays, yes, although it will feel snug. The UK small double is 15cm narrower than the UK double, which gives 67.5cm each for two sharing. If two adults will sleep on the Vitality Excel every night, the UK double is the more comfortable choice.
What room size do I need for a UK small double Komfi Vitality Excel?
We suggest allowing at least 2.4m x 2.8m for the UK small double. That leaves space to walk around the bed and open drawers or a door. In a smaller box room, measure the clearance on the door side carefully before you choose a frame.
What bedding fits a Komfi Vitality Excel UK small double?
Look for small double (4ft) fitted sheets, and a standard double duvet will cover it comfortably. The mattress is 25cm deep, so check the fitted sheet's pocket depth suits that before buying.
Is the UK small double Vitality Excel a good upgrade from a single for a teenager?
It often is. The UK small double is 30cm wider than the UK single but the same length, so the bed takes up more width without pushing further into the room. The firm feel tends to suit back sleepers, although a lighter teenager who sleeps on their side may find it a little unyielding.
Should I get the Komfi Vitality Excel in a small double or a king?
Choose the UK king if two of you share nightly and the room allows. The UK small double is 30cm narrower and 10cm shorter than the UK king, which gives 75cm each for two sharing. We suggest at least 2.7m x 2.9m for the UK king.