Komfi Unity Comfort Eco Foam Mattress
Mattress
Komfi Unity Comfort Eco Foam Mattress
Size
Firmness
Construction
Depth (cm)
14
Layers
2
Layer Details
- Comfort Layer. A high-density Reflex foam comfort layer, which means the surface responds to your shape while keeping a medium level of support. It's the part you'll feel first when you lie down.
- Support System. A sturdy core of Ecofoam, made from fully recycled materials, moulds to your body to encourage healthy posture. That contouring helps reduce tossing and turning through the night.
Layer details from mattressonline.co.uk product page, September 2026.
- Slim enough for bunk beds: At 14cm deep, this UK single sits comfortably below the guard rail height most bunk and mid-sleeper frames require, where deeper mattresses become a safety concern.
- Fits the smallest bedrooms: At 90cm wide, we suggest just 2.1m x 2.8m of floor space, which leaves room for a desk or wardrobe in a compact child's room.
- A sensible child's first foam mattress: The medium feel and contouring Ecofoam core suit growing children and teens, without the cost of a mattress they'll outgrow the frame of anyway.
- Two singles for a shared or guest room: The narrow footprint means siblings sharing a room, or a spare room set up for two guests, can fit two beds with a walkway between.
- Cheap, easy bedding: Single sheets and duvets are the most widely stocked of any UK size, which keeps running costs down alongside an already modest mattress price.
This size suits you if...
You're buying for a child's room, a bunk or mid-sleeper frame where a slim 14cm mattress is a genuine advantage, or a spare room that doubles as an office and needs a bed that doesn't dominate the floor. It also suits a student room or first flat where the frame came with the tenancy and you just need a decent, affordable mattress on top.
Consider another size if...
You're an adult couple, or a single adult who likes to spread out. The UK double, at 45cm wider than the UK single and the same length, would suit you better; allow at least 2.6m x 2.8m of floor space for it.
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.
Will the Komfi Unity in a UK single fit a bunk bed?
Yes, and it's one of the better matches for one. Bunk and cabin frames usually take a standard 90 x 190cm mattress, and their guard rails set a limit on depth. At 14cm, this mattress sits low enough that the rail still does its job, where many deeper mattresses would not. Check your frame's stated maximum depth before ordering.
Is the UK single Komfi Unity suitable for a child?
For most children and teens, yes. The 90 x 190cm size is the UK standard for children's beds, the medium feel supports growing bodies, and it conforms to BS7177:2008 fire resistance standards for home use. Some owners describe it as firmer than the stated medium, which tends to matter less for lighter children than for adult side sleepers.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space. The mattress itself is 90 x 190cm, so in most compact rooms, including a loft conversion where the bed tucks under the slope, you'll still have space left for storage or a desk. If you're fitting two singles for siblings or guests, allow extra width for a walkway between them.
Can an adult sleep on the single Komfi Unity every night?
A lighter single adult can, and the 3ft x 6ft 3in footprint is the standard one-person size. Two cautions though: at 14cm deep it's slimmer than most adult mattresses, so heavier adults may feel the base beneath, and lightweight side sleepers may find it a little firm at the shoulder. For nightly adult use with more space, the UK double is 45cm wider.
Where can I buy the Komfi Unity in a UK single?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so you're seeing current stock and pricing rather than a snapshot. Availability of specific sizes can shift, which is another reason to check the live table rather than a cached listing elsewhere.