Relyon Repose Gel Fusion 2400 Pocket Mattress

Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.

The main draw is the combination of cooling and support. The gel foam layer is designed to run cooler than traditional memory foam, which matters if you tend to overheat at night, and the latex beneath it adapts to your body shape for pressure relief. Underneath, the two spring layers work together: mini pocket springs fine-tune comfort near the surface while the Posturepocket base handles deeper support. Yes, it's a proper spend, but you're getting a 32cm-deep, UK-handcrafted hybrid with an 8 year guarantee listed by the retailer. Mattress Online also lists a 100-night trial and free delivery to most locations, though those are the retailer's own terms rather than Relyon's.

Back sleepers
The medium firm feel and 1,600 Posturepocket springs in the base give steady support that adjusts where you press, which suits lying flat on your back.

Combination sleepers
Latex gives a contouring feel without the slow sink of memory foam, so changing position during the night should feel easy rather than sticky.

Warm sleepers
A gel-infused latex layer is designed to sleep cooler than traditional memory foam, which helps if you tend to overheat at night.

Couples
Each of the 1,600 Posturepocket springs sits in its own cloth pocket and moves independently, so one person shifting about shouldn't disturb the other.

Eco-conscious buyers
The knitted cover is infused with Eco Fibre and a natural probiotic Bio Protect treatment, and the whole mattress is handcrafted in the UK.

If you prefer a soft, sink-in feel, the medium to firm rating here will likely feel too solid, particularly for lightweight side sleepers. Anyone needing a size beyond UK Single or UK Double is out of luck for now. And if you sit on the edge of the bed a lot, one owner reported the edge support falls a little short.

How firm is the Relyon Repose Gel Fusion 2400?

It's rated medium to firm, which suits most back and front sleepers who want clear support with some surface softness from the gel foam and latex layers. Lightweight side sleepers may find it slightly too firm for comfortable pressure relief at the shoulder and hip.

Does the Relyon Repose Gel Fusion 2400 come with a trial?

Mattress Online lists a 100-night trial on this mattress. That's the retailer's own offer rather than a Relyon guarantee, so if you buy elsewhere, check that seller's terms before ordering.

How many springs does the Relyon Repose Gel Fusion 2400 have?

It has 2,400 springs in total: 800 mini pocket springs in the comfort layers and a base of 1,600 Posturepocket springs. Each spring is individually encased, so they respond to your body separately, which helps with motion isolation between partners.

Is the Relyon Repose Gel Fusion 2400 good for hot sleepers?

It should help. The gel foam layer is designed to be more breathable and cooler than traditional memory foam, and the pocket spring layers allow air to move through the mattress. It won't feel as airy as an all-spring mattress, but it's a sensible choice if you run warm.

What guarantee does the Relyon Repose Gel Fusion 2400 have?

Mattress Online lists an 8 year guarantee on this mattress. As that figure comes from a retailer listing rather than Relyon directly, it's worth confirming the guarantee terms with whichever retailer you buy from.