Relyon Ultra Cool Gel 2400 Mattress

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

If you tend to sleep warm and want the responsive, supported feel of springs, a hybrid like this is a sensible direction. The medium firm rating gives a stable, slightly firmer-than-average surface, which means less sinking in and easier movement when you change position at night. Relyon is a long-established British manufacturer, and this model sits at a mid-to-upper price point. That's a real investment, but hybrids at this level are typically built for a longer service life than budget foam alternatives.

Back sleepers
The medium firm rating gives a stable, slightly firmer-than-average surface, which means you stay well supported and sink in less while lying on your back.

Combination sleepers
A medium firm surface means less sinking in, which makes it easier to change position through the night without feeling stuck in the mattress.

Warm sleepers
Its hybrid build gives the responsive, supported feel of springs, a sensible direction if you tend to sleep warm and want a cooler-minded choice.

Couples
Five UK sizes, running from single up to super king, mean there is room to pick a width that gives two people proper space.

If you prefer a soft, cradling surface, the medium firm feel here will likely feel too solid, particularly for lighter side sleepers. Buyers who want full construction details before spending, such as depth and spring specification, may also be frustrated, since those figures aren't published in the retailer listing.

How firm is the Relyon Ultra Cool Gel 2400?

It's rated medium firm in the retailer listing. In practice that means a supportive surface with a little give on top, generally well suited to back sleepers and heavier builds. Lighter side sleepers may find it slightly too firm for comfortable pressure relief at the shoulder and hip.

What sizes does the Relyon Ultra Cool Gel 2400 come in?

Five UK sizes are listed: single, small double, double, king and super king.

Does the Relyon Ultra Cool Gel 2400 come with a sleep trial?

Mattressman offers a 60-night sleep trial and a 14-day return policy. These are Mattressman's own terms rather than a Relyon guarantee, so check the conditions directly with the retailer before you buy.

Is the Relyon Ultra Cool Gel 2400 a pocket sprung mattress?

It's listed as a hybrid, meaning it pairs a sprung base with comfort layers on top. The exact spring type and count aren't confirmed, so we'd suggest asking the retailer for the full specification if that detail matters to you.