Komfi Vitality Excel 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
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Komfi Vitality Excel Mattress in a Box
More available sizes
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
- Fits a typical shared bedroom: At 135 x 190cm, the UK double leaves space for a wardrobe and drawers in rooms where a UK king, which needs at least 2.7m x 2.9m, would crowd things.
- Firm push-back for two: The firm Responsive Support Core is designed to resist sinking, which means two people with 67.5cm each should find it a little easier to stay on their own side.
- Space for one plus a pet: Sleeping solo, you get the full 135cm width of the UK double, so a dog or cat can take over a corner while you still stretch out.
- Bedding is easy to find: Standard double sheets and a 200 x 200cm double duvet fit the UK double, so you can likely keep using the bedding you already own.
- A sensible guest room choice: For visiting couples, the firm feel suits back sleepers well, although lighter side sleepers may find it slightly unyielding at the shoulders for a few nights' stay.
This size suits you if...
You share the bed with a partner in a typical UK bedroom of at least 2.6m x 2.8m and want space left for furniture, or you sleep alone and like room to spread out alongside a pet. It also fits if you're setting up a spare room for visiting couples.
Consider another size if...
You and your partner both sprawl, or 67.5cm each already feels tight. We'd recommend the UK king instead, which gives 75cm each and needs at least 2.7m x 2.9m.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Is the Komfi Vitality Excel UK double big enough for two people?
For most couples, yes. The UK double gives 67.5cm each, which is a little snug if either of you moves around a lot. The firm foam build helps, because you're less likely to roll towards each other. If you want more personal space, the UK king gives 75cm each.
What size bedroom do I need for a Komfi Vitality Excel double?
We suggest at least 2.6m x 2.8m for the UK double. That covers the bed with walking space, but if you want bedside tables on both sides with room to open drawers, around 3m x 3m is more comfortable. Measure your room before comparing the retailers listed on this page.
Komfi Vitality Excel double or king: which is better for couples?
The UK king is 15cm wider and 10cm longer than the UK double, giving each of you 7.5cm more. Taller sleepers will notice the extra length most. The UK king needs at least 2.7m x 2.9m, so if your room is smaller, the UK double is the more practical choice.
How big is a Komfi Vitality Excel UK double in feet and inches?
The UK double measures 4ft 6in x 6ft 3in, or 135 x 190cm. It's the same length as the UK single and UK small double, so the extra width is where you gain space. The mattress is 25cm deep, so check your fitted sheets have deep enough pockets.
Should a solo sleeper choose the UK double or UK small double?
The UK double is 15cm wider than the UK small double and the same length. If you share the bed with a pet or like to starfish, the UK double gives you that extra margin. In a smaller room, the UK small double needs at least 2.4m x 2.8m, so it may suit you better.