Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
25
Number of Layers
2
Trial Period (nights)
60
Warranty (years)
10
Price Range
£159 to £299
Best Sleeping Position(s)
Certifications
Assessed from Arthur Sleep's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
If you're a hot sleeper on a budget, this is one to shortlist. The gel foam comfort layer is breathable and draws heat away, which means less of that clammy feeling on warm nights, while the 800 pocket springs respond to your body individually for targeted support. It's medium firm, a feel that suits most sleepers, although lightweight side sleepers may find it slightly firm. Priced from £159 to £299 across five UK sizes, it undercuts many rivals, and the 10-year guarantee is reassuring at this price. It is single-sided, so no flipping needed, and comes vacuum packed and rolled with turning handles and edge support.
Key Features & what's inside
- Gel foam comfort layer. A breathable gel foam layer that draws heat away from your body. In practice, this means a cooler sleeping surface than standard foam.
- 800 pocket spring support system. 800 responsive pocket springs that move independently, giving targeted support where you need it. This also helps limit motion transfer if you share the bed.
Layer details from arthursleep.co.uk product page, September 2026.
Who's it NOT for?
Skip this one if you want an all-natural mattress, as it uses synthetic fillings and foams. Lightweight side sleepers may find medium firm a little too much pressure on hips and shoulders. And if you dislike conditional offers, note the 60-night trial only applies if you add a mattress protector at checkout.
Arthur Sleep Cool Pocket Mattress
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How firm is the Arthur Sleep Cool Pocket Mattress?
Arthur Sleep rates it as medium firm. That's a feel that suits most back and combination sleepers, although lighter side sleepers may find it slightly firm for pressure relief at the shoulder.
Does the Arthur Sleep Cool Pocket Mattress come with a trial?
Yes, there is a 60-night sleep trial, but with a catch: it only applies if you buy a mattress protector at checkout. Worth factoring that into the total cost before you order.
How many springs does the Arthur Sleep Cool Pocket Mattress have?
It has 800 pocket springs, each moving independently to support you where you need it. That sits below premium spring counts, but is reasonable for a mattress starting from £159.
Do you need to flip the Arthur Sleep Cool Pocket Mattress?
No. It's single-sided, so there's no flipping, though it does have turning handles so you can rotate it end to end, which helps it wear evenly over time.
What sizes does the Arthur Sleep Cool Pocket Mattress come in?
Five UK sizes: single, small double, double, king and super king, priced from £159 to £299. It comes vacuum packed and rolled with free next day delivery.
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