Firmness
Medium Firm
Type
Hybrid
Depth (cm)
25
Number of Layers
6
Trial Period (nights)
100
Warranty (years)
10
Price Range
£895 to £1,019
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.
This mattress makes most sense if you want firmer orthopaedic support without sleeping hot. The castellated foam is cut into grid-like sections that move independently, which means better airflow and less disturbance when a partner moves, and the TrueGel layer adds temperature regulation on top. The removable, washable cover is made with Seaqual yarn, and the Ecofoam base is made by a carbon neutral company and is 100% recyclable at end of use, a genuine plus if sustainability matters to you. If you buy from Mattress Online, you get their 100-night trial, free delivery to most UK locations, and optional room-of-choice delivery for £20.00 or old mattress removal for £35.00.
Key Features & what's inside
- Microquilted cover. A micro-quilted cover gives the surface a smooth, soft finish. The cover is made with Seaqual yarn and is removable and washable, which makes it easier to keep fresh.
- Medically-proven castellated foam. This foam is shaped into grid-like sections that move independently, which means airflow through the comfort layer and less motion transfer to your side of the bed. The zones also distribute body weight more evenly.
- TrueGel Technology. A specialised gel layer that draws excess heat away from the body, which means a cooler feel through the night. It also adapts to your body's contours for targeted pressure relief.
- Pocket Springs. 1000 pocket springs adjust individually to your body shape, which means tailored support and healthy spinal alignment. Because each spring moves on its own, motion transfer is kept to a minimum.
- Reflex Foam. A supportive foam that moulds to your body and promotes spinal alignment. It's durable and resilient, holding its shape over an extended period.
- Ecofoam. A sustainable base foam that is durable, resilient and naturally dust mite resistant. It's made by a carbon neutral company and is 100% recyclable at end of use.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you're a lightweight side sleeper or simply prefer a softer, more cushioned surface, the medium to firm feel here may be firmer than you'd like. It's also only made in UK King and Super King, so anyone needing a single or standard double will have to look elsewhere.
Komfi GelMed Ortho Mattress
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Is the Komfi GelMed Ortho mattress firm?
Komfi describes it as medium to firm, so it sits at the supportive end of the scale. That suits back and front sleepers well, and side sleepers with a heavier build, but lighter side sleepers may find it slightly too firm at the shoulders and hips.
Does the Komfi GelMed Ortho come with a trial?
Mattress Online lists a 100-night trial with this mattress. That trial is the retailer's own offer rather than a Komfi guarantee, so if you buy elsewhere, check that retailer's returns terms before ordering.
How long is the guarantee on the Komfi GelMed Ortho?
The Mattress Online listing states a 10-year guarantee. That's a reassuring span for a mattress at this price, and it's worth keeping your proof of purchase in case you ever need to make a claim.
Does the Komfi GelMed Ortho sleep hot?
It's designed not to. The TrueGel layer draws excess heat away from the body, and the castellated foam is cut into sections that allow air to move through the comfort layers. If you're a hot sleeper, this is one of its stronger points.
Do you need to flip the Komfi GelMed Ortho mattress?
No. It's a single-sided design, so it never needs flipping. Rotating it from head to toe now and then will help the comfort layers wear evenly. It arrives rolled up and compressed for easier delivery and handling.
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