Firmness
Medium
Type
Foam
Depth (cm)
25
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
10
Price Range
£619 to £1,059
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Cooling is the strongest argument here. Traditional foam holds heat, but this mattress layers gel-based TrueGel technology over castellated foam, grid-shaped sections that move independently and let air circulate, so warmth is pulled away rather than trapped. Those independent zones also limit motion transfer, which means a restless partner is less likely to wake you. Underneath, reflex foam moulds to your body to support spinal alignment. There's a quiet sustainability angle too: the build includes Ecofoam, a 100% recycled and re-engineered foam, and Komfi is a carbon neutral certified company and a National Bed Federation Approved Brand. Yes, £619 to £1,059 is a real spend, but the retailer-listed 10-year guarantee gives that price some cover.
Key Features & what's inside
- Micro-quilted cover. A soft knitted cover with thin layers of fabric and padding stitched together, which means a smooth, slightly plush surface feel from the moment you lie down. It's the gentlest part of an otherwise medium to firm mattress.
- TrueGel Technology. Komfi's grid-like gel layer regulates body temperature by drawing heat away from you. If you're a hot sleeper, this is the layer doing the most work on your behalf.
- Medically-proven castellated foam. Foam cut into grid-like sections that move independently, promoting airflow and minimising motion transfer. In practice, that means better temperature control and less disturbance when a partner shifts position.
- Reflex Foam Support system. A durable, resilient base foam that moulds to your body and promotes spinal alignment. It gives the mattress its supportive, medium to firm character.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you love a soft, sink-in feel, this medium to firm foam probably isn't for you, and lightweight side sleepers may find it a little unyielding at the shoulder and hip. Devotees of traditional pocket springs should also look elsewhere: this is an all-foam design, a well-ventilated one.
KomfiMed Pro Medium Mattress
Is the KomfiMed Pro Medium mattress firm or soft?
It's listed as medium to firm on the retailer's page, slightly firmer than the plain 'medium' label suggests. Expect gentle surface softness from the micro-quilted cover with solid support beneath from the reflex foam base, which suits back and stomach sleepers well.
Does the KomfiMed Pro sleep hot?
It's designed not to. TrueGel technology draws heat away from your body, and the castellated foam beneath is cut into grid sections that promote airflow, which means less trapped warmth than a standard solid foam mattress.
Does the KomfiMed Pro Medium come with a trial and guarantee?
Mattress Online, the retailer listing it, offers a 100-night trial and a 10-year guarantee. These are the retailer's own terms rather than manufacturer promises, so check the conditions wherever you buy.
How deep is the KomfiMed Pro Medium mattress?
It's 25cm deep, so standard fitted sheets should fit comfortably. It's available in UK Single, Double, King and Super King sizes.
Is the KomfiMed Pro mattress eco-friendly?
It includes Ecofoam, a 100% recycled and re-engineered foam, and Komfi is a carbon neutral certified company. The mattress is handcrafted in the UK and Komfi is a National Bed Federation Approved Brand.
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