Komfi Unity Deluxe Mattress
Mattress
Komfi Unity Deluxe Mattress
Size
Firmness
Firm
Construction
Depth (cm)
17
Layers
2
Layer Details
- Reflex Foam. A flexible reflex foam layer that supports spinal alignment, which means your back stays level rather than sagging into the mattress. It's the backbone of the Unity Deluxe's firm feel.
- Ecofoam. Made from recycled materials, this layer lowers the mattress's carbon footprint while adding a softer, cradling comfort above the firmer base. It takes a little edge off the firmness without undermining the support.
Layer details from mattressonline.co.uk product page, September 2026.
- The classic shared size: At 135 x 190cm, the UK double is the long standing standard for two, giving 67.5cm each for two people sharing.
- Firm support across the full width: The reflex foam base keeps its firm feel edge to edge, which means neither of you rolls into a dip in the middle.
- Fits rooms a king would crowd: We suggest at least 2.6m x 2.8m for a UK double, which leaves space for bedside tables on both sides in most master bedrooms.
- Easy to get upstairs: The shallow 17cm all-foam build makes this double lighter and more flexible than a sprung equivalent, useful on the turning stairs of older terraces.
- 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 on a stretched budget.
This size suits you if...
You share the bed every night and want the traditional couples' size in a room where a UK king would leave no walking space, or you're kitting out a first flat or second bedroom on a tight budget and need a firm, sensible mattress that leaves room for a wardrobe and drawers. It also suits a guest room that hosts visiting couples a few times a year.
Consider another size if...
You and your partner both like space and your room measures at least 2.7m x 2.9m. The UK king is 15cm wider and 10cm longer, and for two adults sharing nightly we'd recommend it instead.
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.
Is the Komfi Unity Deluxe double big enough for a couple?
Yes, for most couples. The UK double gives 67.5cm each for two people sharing, which is the traditional standard, and the firm reflex foam base holds its shape under two sleepers rather than sagging towards the middle. Broad-shouldered partners or restless sleepers may prefer the UK king, which is 15cm wider and 10cm longer.
What room size do I need for the Komfi Unity Deluxe in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. The mattress itself is 135 x 190cm, so in a typical UK master bedroom you should still fit bedside tables on both sides. If your room is smaller, the UK small double is 15cm narrower and we suggest at least 2.4m x 2.8m for it.
Is the double easy to get up narrow stairs?
Easier than most. At 17cm deep this is a shallower mattress than many, and the all-foam construction flexes around tight corners, so a double should manage the turning stairs of an older terrace or a tight new build landing better than a sprung mattress of the same width. Two people carrying it is still sensible.
Should a couple choose this mattress in a double or a king?
It comes down to your room. The UK double suits bedrooms from 2.6m x 2.8m and leaves more floor space for wardrobes and drawers. The UK king is 15cm wider and 10cm shorter of nothing, sorry, 10cm longer, and needs at least 2.7m x 2.9m. If the room allows a king, most couples appreciate the extra width.
Does the Komfi Unity Deluxe double work as a guest bed?
It's a strong fit. The firm feel suits occasional use by visiting couples of different weights, the modest depth makes it easy to handle when you rearrange the room, and double bedding is cheap and stocked everywhere. Lightweight side sleepers staying regularly may find it a little firm on shoulders and hips, though.