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Komfi Unity Deluxe Mattress
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Komfi Unity Deluxe Mattress

FirmnessFirm
ConstructionMemory foam

In shortFor back sleepers on a budget, this firm foam mattress is a decent shout, especially if your partner fidgets. I'd look elsewhere if you sleep on your side or run hot, and one reviewer reports early dips. Read the review


Reveal Offer Price and Go To Site
100-night comfort trial at Mattress OnlineConditions
Remedy
An exchange, not a refund
When
After 30 nights' use
Condition
Buy a mattress protector from Mattress Online with the mattress
Old mattress removal
£35
Delivery
Free; to the room of your choice £20

Checked on Mattress Online's site, 10 October 2026. Full terms at Mattress Online

Who is it best for? powered by SnoozeScore

In our experience, the materials and construction that go into this product can make it suitable for the following people.

Back sleeping and stomach sleeper icon
For back and stomach sleepers
Additional support helps these positions
Warmer for cold sleepers icon
Warmer for cold sleepers
Holds warmth for chillier sleepers.

What our reviewers found

Pros

  • Firm and level for a back sleeper, and one owner called it "Firm and comfortable for those that need back support".
  • Comprised of eco-friendly, recyclable materials, depicting a conscious choice towards a greener future.
  • The foam soaks up movement, so a restless partner disturbs you less.
  • Convenient and easy-to-maintain with its washable cover, ensuring lasting freshness and hygiene.
  • Owners call it good value for money.

Cons

  • Too firm if you sleep on your side or like a softer bed.
  • Hot sleepers should skip it: there are no springs to let air through the foam.
  • At 17cm it's thin, and one owner found bumps and holes in the foam within five months.

A refreshing night's sleep depends heavily on the kind of mattress you choose. With so many mattress options out there, Komfi has positioned itself as a budget-friendly, but high-quality contender with its Unity Deluxe Mattress. A good sleep should never compromise on quality, and it is with this ethos in mind that we bring you this review.

How we assessed it

The Unity Deluxe is foam all the way through: a top layer of high-density reflex foam over a layer of eco foam, 17cm deep and rated firm. That makes for a solid, level surface with very little bounce. Owners describe it as firm and comfortable: one wrote "no tossing and turning trying to get comfy", another reported "Great comfort and support when lying on this mattress". An all-foam core holds on to more warmth than a sprung one, so it sleeps warm, and one owner did find it hot. At 17cm it's thinner than I like: I'm wary of any mattress under about 20cm.

Design and features

The Komfi Unity Deluxe Mattress delivers a depth of 17cm, enveloping dual foam comfort layers into its structure. The topmost layer, high-density reflex foam, greets sleepers with a plush hug, acting like a gentle sponge that absorbs movement to create a pleasant, motion-free sleep experience.

This mattress employs eco foam constructed from recycled materials, aligning the product with a more sustainable approach.1 This feature signifies Komfi's commitment to reducing a carbon footprint and contributing positively to environmental sustainability. The use of such eco-friendly materials does well to balance comfort with consciousness.

Rated as firm, the Komfi Unity Deluxe mattress thrives in furnishing exemplary support, especially beneficial for back sleepers. While maintaining simplicity in design and functionality, the mattress is single-sided, relieving you from the need to flip it over. Monthly rotation will serve well in preserving its durability and performance.

Mattress comfort

The Unity Deluxe mattress' firm support doesn't undermine its capacity to deliver comfort. The top layer of high-density reflex foam cradles the sleepers warmly, letting you sink into its plushness. Alongside, its motion-free surface ticks a vital box for people sharing their sleeping space with a fidgety partner.

The mattress bends very little under your weight, so a back sleeper's hips stay level with the shoulders. An additional layer of eco foam derived from recycled materials caters to the comfort quotient while significantly reducing the product's carbon footprint.

Suitability

Every mattress tells a story of comfort and suitability, and in the case of the Komfi Unity Deluxe, the tale is one best listened to by back sleepers. The firmness stops a back sleeper's hips sinking, and that's who it's for. Side sleepers should skip it, and front sleepers who like a firm bed will get on with it.

What customers thought

Owners mostly call it comfortable and supportive, and for some the firm feel is why. One wrote "really firm which is great for me", and another called it "Firm and comfortable for those that need back support". Value comes up too. "Great value", wrote one owner, who also found it "a little to firm" but fine for a spare room. The complaints are fewer: one owner said it was "Not the thickest mattress and I found it to be very hot", and added a breathable topper to deal with the heat. Another reported "bumps and holes" in the foam on a mattress that was "only 5 months old". And one found it "super heavy" and "really bulky and hard to move" until it was unrolled.

The verdict

The Komfi Unity Deluxe Mattress is an appealing option for back sleepers on a budget. Its high-density reflex foam and eco foam layers working in tandem deliver a comfortable yet firm surface conducive to an uninterrupted sleep. Its price is low enough to raise a few eyebrows, and the comfort it delivers is surprisingly good for its cost. However, potential buyers need to keep in mind that one owner reported bumps and holes in the foam after five months.

The Unity Deluxe, despite being an all-foam mattress, offers substantial support, endorsing what most back sleepers look for in a mattress. Its eco-conscious assembly, with the use of recycled materials, implies a lesser environmental impact, making it a winning choice for the environmentally conscious. While this mattress is undoubtedly great for the price, care must be taken in its usage to ensure its longevity.

Buy it if you sleep on your back and the budget is tight. If you sleep on your side or run hot, spend a little more on something deeper than 17cm.

References (1)

  1. Nees et al. (2024). Polyurethane Waste Recycling: Thermolysis of the Carbamate Fraction. ACS omega.

    https://pmc.ncbi.nlm.nih.gov/articles/PMC11525496/↩

How we reviewed the Komfi Unity Deluxe Mattress

10+ years in the mattress industry35-point spec checkBenchmarked against 77 memory foam mattresses4 buyer questions read90 price checks since Oct 2024

Drawing on over 10 years in the mattress industry, our team judged the construction, materials and firmness of the Komfi Unity Deluxe Mattress point by point from its 35-point specification and Mattress Online's listing, and benchmarked it against 77 other memory foam mattresses we track. We have checked its price 90 times since October 2024. How we review

How does it feel?

Personalised feel depends on bodyweight. Adjust your weight below to get an indication of how the Komfi Unity Deluxe Mattress may feel.

SnoozeScore

Still not sure if the Komfi Unity Deluxe Mattress is suitable for you?

Answer 6 quick questions to see how well this mattress fits you, and which mattresses fit you better.

Price history

From £145 (Single) at Mattress Online

Choose your size
£225High end of our 90-day readings Read 15 Nov 2026 · excludes delivery
Shop King at Mattress Online

Our latest King reading against the last 90 days

Low £197 (27 Oct)High £225 (3 Nov)

King price, tracked since 27 Oct

Our readings of the King at Mattress Online over the last 90 days ran from £197 to £225.

SizeLatest readingReadLowest readingOnTracking since
Single£14515 Nov 2026£12327 Oct 202627 Oct 2026
Small Double£19915 Nov 2026£17327 Oct 202627 Oct 2026
Double£19915 Nov 2026£17327 Oct 202627 Oct 2026
King£22515 Nov 2026£19727 Oct 202627 Oct 2026

Prices exclude delivery. How we record prices: our mattress price report.

How it scores
of the Komfi Unity Deluxe Mattress
Scored from the build: how this construction usually performs, compared with mattresses of a similar type and price.
Scored from the build: how this construction usually performs, compared with mattresses of a similar type and price.

Suitability

  • Back Sleepers 4.5/5
  • The amount of support offered from a mattress will vary depending on the firmness of the tension and the type of support layer used. Based on a person of average build.
  • Side Sleepers 3/5
  • If you sleep on your side you typically need a supportive tension that is not too firm, nor too soft. This is because your hips and shoulders need adequate sinkage.
  • Stomach Sleepers 4.5/5
  • Stomach sleepers need a reasonable amount of tension in the base support layer to adequately offer body contouring and help prevent aches and pains. Results will vary based on your build.

Performance

  • Breathability 3.5/5
  • Mattresses that feature breathable materials help promote airflow and keep you cool making for a more hygienic night's sleep.
  • Turning on mattress 3.5/5
  • Certain materials like memory foam can make it difficult to move about on the mattress while you toss and turn. Same too for pillow tops which can create a cloud like sensation which can make manoeuvrability challenging.

Odour

  • Initial Odour 3/5
  • Materials in mattresses, particularly memory foam and rolled bed-in-a-box mattresses can have an initial odour, this is typically short term and reduces considerably within 24 hours.
  • Long Standing Odour 4.5/5
  • Certain materials inside different mattresses can produce a small odour. Typically this is short term rather than long standing but there are minor exceptions.

Brand Rating

  • Overall Brand Rating 4.5/5
  • This is based on community driven customer reviews tied to product reviews and grouped together at a brand level to produce a score.
*Assumes average weight. Suitability is dependent on body type, so check your SnoozeScore above for a more tailored guide.
Radar analysis
of the Komfi Unity Deluxe Mattress
Brand: Komfi
Retailer: Mattress Online
Delivery Time: Excellent
Delivery Charge: Excellent
Customer Sentiment: Good
Guarantee: Excellent
Radar Analysis looks at the product, brand and retailer against base norms established within the industry and determines where the product sits by way of established performance metrics.

Reviews

Pick a star rating to see only those reviews.

4.0owner rating out of 513 reviews
Tracy
Verified by Mattress Online
5
This is a brilliant mattress! really firm which is great for me. no tossing and turning trying to get comfy. The only negative i would offer is it was super heavy and was really bulky and hard to move. if the dimensions were stated when rolled i would have gone for the option for the delivery to be placed in my bedroom for me! once it was unrolled though there were no further problems. Definitly buying from here again!
Gerald
Verified by Mattress Online
3
Nice feel, very comfortable and offers great support. Not the thickest mattress and I found it to be very hot. However, I bought a breathable mattress topper to add extra layer and to prevent overheating. Overall it's a decent mattress.
Brogan
Verified by Mattress Online
3
The mattress arrived clean and firm but over last few months and bumps and holes where the form looks like its almost deflated. this mattress is only 5 months old
Mr Canavan
Verified by Mattress Online
1
The mattress was a double Komi, which I'm pleased to say is very comfortable and I'm experiencing many good nights sleep. 5star
Mrs R Forkin
Verified by Mattress Online
5
Great comfort and support when lying on this mattress. I would definitely recommend it.
Danielle
Verified by Mattress Online
5
Great company, fab service. Products are great quality and very reasonably priced.
Nigel
Verified by Mattress Online
4
Firm and comfortable for those that need back support,this is for you.
Ian
Verified by Mattress Online
4
Great value but a little to firm as it's for spare room no problem
Bridie
Verified by Mattress Online
5
Great purchase. Very comfortable mattress, good value for money!
Mark
Verified by Mattress Online
5
Nice mattress that is comfortable.
Ernesto
Verified by Mattress Online
3
Good packaging. Easy to fit.
Trusted Customer
Verified by Mattress Online
4
Nice mattress
Richard
Verified by Mattress Online
5
Excellent

Questions about the Komfi Unity Deluxe Mattress

Have a question?

Nobody has asked about this one yet. Ask about the size, the feel or whether it suits how you sleep.

Videos about this mattress

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Mattress Online
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Guides this mattress is featured in

This mattress is listed in 3 of our guides because its build meets what each guide looks for. Each card says what that is.

  • Adjustable guide

    Why it’s featured

    This guide lists mattresses sold for adjustable beds, and all-foam or all-latex builds, which bend with the base.

    Includes comment from a registered clinician
    Read the guide
  • Acid reflux guide

    Why it’s featured

    This guide lists mattresses that can bend on an adjustable base: those sold for one, all-foam and all-latex builds, and medium or medium-firm latex mattresses.

    Read the guide
  • Cold sleepers guide

    Why it’s featured

    This guide lists mattresses with memory foam or wool in them, which hold warmth.

    Read the guide

Clinicians comment on the condition in each guide, not on individual mattresses.

Sources for this review

  • Our assessmentConstruction, materials and firmness judged by our team, from over 10 years in the mattress industry
  • Specification35 points from Mattress Online's listing
  • Buyer questions4 read
  • Price history90 checks since October 2024
  • BenchmarkCompared with 77 other memory foam mattresses we track
  • Site-wideOur price tracker has logged 1,359,225 retailer prices since June 2019

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