Copper Fresh Envy 4000 Mattress
The Copper Fresh Envy 4000 is a medium-feel hybrid mattress, 20cm deep, combining memory foam, a pure copper layer and a 1000 pocket spring unit.
- Copper layer draws heat away
- Minimises partner disturbance
- Medium feel suits most sleepers
£414
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A quick note on the name of the Copper Fresh Envy 4000: the 4000 is range branding, and the spec table confirms 1000 pocket springs, which is still a respectable count at a mid-range starting price. It's handcrafted in the UK and comes with a 100-night comfort trial and a 5-year guarantee. The copper layer is the headline feature, designed to draw heat away from your body, which makes this one worth a look if you tend to sleep warm.
Mattress specifications
Firmness
Medium
Type
Hybrid
Depth (cm)
20
Number of Layers
6
Trial Period (nights)
100
Warranty (years)
5
Price Range
£414 to £484
Best Sleeping Position(s)
Side Sleeping
Back Sleeping
Combination Sleeping
Certifications
BS 7177
Assessed from Copper Fresh's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
The main draw here is temperature control. The pure copper layer is described by the brand as 1000 times more conductive than wool, silk or polyester, which means it pulls heat away from you rather than trapping it the way traditional memory foam can. It's also antimicrobial. Beneath that, 1000 pocket springs move independently, so a restless partner is less likely to disturb you. The medium feel suits most sleepers, and with free next day delivery, a 100-night trial and a 5-year guarantee, the price feels fair for a UK-handcrafted hybrid. Do note the trial is exchange based and requires a protector purchase.
Key features & layer details
Knitted cover
A soft knitted finish that's breathable, which means air can move through the sleep surface rather than building up heat against your skin.
35mm Memory foam
This layer contours and cushions for pressure relief, so your hips and shoulders sink in slightly rather than pressing against a hard surface. The brand says it's backed by 12 years of R and D using AI and body pressure mapping.
Pure copper layer
An entire layer of pure copper, which the brand states is 1000 times more conductive than wool, silk or polyester. In practice, that means heat is drawn away from your body, and copper is naturally antimicrobial too.
Reflex foam
Sitting between the copper and the springs, this firmer foam helps achieve the medium feel. It stops you sinking too far into the comfort layers above.
1000 pocket spring unit
Each spring sits in its own fabric pocket and works independently, which means movement on one side of the bed is far less likely to travel across to yours.
Recycled rebound foam base
A durable base with foam-encapsulated edge support, so the mattress holds its shape and you can sit or sleep near the edge without it giving way.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Warm sleepers
A full layer of pure copper draws heat away from your body, and the breathable knitted cover lets air move through, so the bed should feel cooler.
Couples
Each of the 1000 pocket springs works independently, which means movement on one side is far less likely to travel across and disturb your partner.
Side sleepers
The 35mm memory foam layer contours and cushions, so your hips and shoulders sink in slightly rather than pressing against a hard surface.
Combination sleepers
A medium feel from the reflex foam layer stops you sinking too far, which suits changing position between your side, back and front through the night.
Allergy sufferers
The pure copper layer is naturally antimicrobial, which gives a cleaner sleep surface for anyone who prefers a mattress with that built-in quality.
It's only made in single, small double and double, so king and super king sleepers will need to look elsewhere. It's also single-sided, meaning you'll need to rotate it every one to two months rather than flip it. And if you want a distinctly firm or soft feel, this medium won't suit.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Copper Fresh Envy 4000 Mattress
Last seen for £589 at Mattress Online on 25th June 2026
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FAQ's
Is the Copper Fresh Envy 4000 mattress firm or soft?
It has a medium feel, confirmed on both the brand page and retailer listings. That suits most sleeping positions, although if you're a heavier person who prefers a firmer surface, or a very light side sleeper wanting something softer, it may not be your best match.
Does the Copper Fresh Envy 4000 have 4000 springs?
No. The 4000 in the name is range branding rather than a spring count. The spec table states a 1000 pocket spring unit, with each spring working independently in its own fabric pocket to minimise motion transfer.
Does the Copper Fresh Envy 4000 come with a trial?
Yes, a 100-night comfort trial, though it's exchange based rather than a full refund scheme, and you'll need to buy a mattress protector to qualify. There's also a 5-year guarantee, and delivery is free, including a next day option.
Is the copper layer in a mattress good for hot sleepers?
The brand states the pure copper layer is 1000 times more conductive than wool, silk or polyester, which means it draws heat away from your body rather than holding it near the surface. If you're a hot sleeper put off by memory foam's reputation for warmth, this is the design's answer to that.
What sizes does the Copper Fresh Envy 4000 come in?
UK single, small double and double. There's no king or super king option, which is a limitation if you share the bed and want more space. The mattress is 20cm deep.
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