Firmness
Medium Firm
Type
Hybrid
Depth (cm)
24
Number of Layers
3
Trial Period (nights)
100
Warranty (years)
5
Price Range
£149 to £269
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.
This is a sensible pick if you want proper pocket springs at a budget price. The 800 springs work independently, which means less disturbance when a partner moves and support that adjusts to your shape rather than pushing back evenly across the bed. The soft Reflex foam layer above adds cushioning at the surface, and the medium feel suits most sleeping positions without committing you to firm or soft. Yes, it's a simpler build than pricier hybrids, but the 100 night trial and 5 year guarantee give you a fair safety net. It's single-sided, so you rotate it rather than flip it. Available in five UK sizes from Single to Super King, priced £149 to £269.
Key Features & what's inside
- Knitted cover. A super-soft knitted cover with a touch of breathability, which means a gentler first impression when you lie down and a little help letting warm air escape.
- Soft foam comfort layer. A layer of soft Reflex foam sits beneath the cover, cushioning shoulders and hips. It softens the feel of the springs below without making the mattress feel plush overall.
- 800 pocket spring unit. Pressure-reactive springs work independently, which means support tailored to where your body needs it and virtually no motion transfer across the bed. If you share, you should feel far less of your partner's movement.
Layer details from mattressnextday.co.uk product page, September 2026.
Who's it NOT for?
Skip this one if you prefer a firm mattress, since the medium feel and soft foam layer will likely feel too giving. Heavier sleepers wanting deep, substantial support may also find the 24cm profile and simpler build a little basic. And if you like a flippable mattress, this is single-sided.
Coolflex Essentials Pocket Mattress
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How firm is the Coolflex Essentials Pocket Mattress?
Coolflex describes it as medium. In practice that means a balanced feel: the soft Reflex foam layer cushions you at the surface, while the 800 pocket springs provide support underneath. It suits most sleepers, although anyone who prefers a distinctly firm surface may find it a little soft.
Does the Coolflex Essentials mattress come with a trial?
Yes, it comes with a 100 night trial and a 5 year guarantee. That gives you a few months to sleep on it at home before committing, which is a reasonable safety net for a budget-priced mattress.
How long does the Coolflex Essentials take to expand?
It arrives vacuum-sealed and rolled, and expands within 24 hours of unpacking. You can sleep on it sooner if it looks fully expanded, but allowing the full day is the safer bet.
Can you flip the Coolflex Essentials Pocket Mattress?
No, it's single-sided, so it isn't designed to be flipped. Rotating it head to toe now and then helps the comfort layers wear evenly instead.
What sizes does the Coolflex Essentials come in?
It's available in UK Single, Small Double, Double, King and Super King, priced from £149 to £269 depending on size. All sizes are 24cm deep, with free next day delivery from MattressNextDay.
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