Firmness
Type
Hybrid
Depth (cm)
32
Number of Layers
4
Trial Period (nights)
Warranty (years)
5
Price Range
£279 to £429
Best Sleeping Position(s)
Certifications
Assessed from Coolflex's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
The main appeal is that pillow top: it acts as a built-in topper, so you get soft initial cushioning over a Medium Firm core rather than having to buy one separately. Beneath it, cool gel memory foam draws heat away from the body, which means the foam moulds to you without the clammy warmth memory foam is known for. If you're a hot sleeper who has been put off memory foam before, that combination is the point of this mattress. The 800 pocket springs move independently, so a restless partner is less likely to disturb you, and the reinforced edges let you use the full width of the bed. The 5-year guarantee is shorter than some brands offer, but the price reflects that.
Key Features & what's inside
- Pillow Top. A plush pillow top acts as a built-in mattress topper, filled with Comfort Foam layers. In practice this gives you extra cushioning and pressure relief the moment you lie down.
- Cool Gel Memory Foam. A generous layer of Cool Gel Memory Foam actively draws heat away from the body for a cooler sleep. It also gently moulds to your body shape, which means personalised pressure relief at your hips and shoulders.
- Pocket Springs. High tensile steel pocket springs sit in individual fabric pockets and move independently. That means the mattress adapts to changes in your weight distribution through the night, and you feel less of your partner's movement.
- Reinforced Edge Springs. An outer ring of firmer pocket springs reinforces the edges. You can sleep or sit right at the side without the mattress sagging away beneath you.
- Knitted Cover. A knitted cover finishes the mattress. It is hypoallergenic and vegan friendly, useful if allergies are a concern.
Layer details from mattressnextday.co.uk product page, September 2026.
Who's it NOT for?
If you like a soft, sink-in feel throughout, the Medium Firm core under that pillow top may feel firmer than you want, particularly if you're a lightweight side sleeper. And if a long guarantee matters to you, 5 years is on the shorter side. Fans of a traditional, spring-only feel may also prefer to skip the memory foam.
Coolflex Premium Memory Hybrid Mattress
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Is the Coolflex Premium Memory Hybrid mattress firm or soft?
Coolflex rates it Medium Firm. The pillow top and Comfort Foam layers soften the initial feel, so it cushions on the surface with firmer support underneath. Most back and front sleepers should find it comfortable, although lighter side sleepers may find it slightly too firm.
Does the Coolflex Premium Memory Hybrid sleep hot?
It is designed not to. The Cool Gel Memory Foam layer actively draws heat away from the body, so you get the moulding, pressure-relieving feel of memory foam with less of the warmth it is often criticised for. Hot sleepers are a target buyer here.
How deep is the Coolflex Premium Memory Hybrid mattress?
It is 32cm deep, which is generous. Worth checking your fitted sheets: standard-depth sheets may not stretch over a mattress this tall, so you may need deep or extra-deep fitted sheets.
What guarantee does the Coolflex Premium Memory Hybrid come with?
It comes with a 5-year guarantee. That is shorter than some brands offer, but it is reflected in the price, which starts at £279.00.
What sizes does the Coolflex Premium Memory Hybrid come in?
Five UK sizes: Single, Small Double, Double, King and Super King. Prices range from £279 to £429 depending on size.
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