Wentworth Mercer Mercer 3000 Pocket Pro Mattress
The Wentworth Mercer Mercer 3000 Pocket Pro Mattress combines a pocket spring core with extra layers of mini springs and a double-sided, flippable build, which means firm, bouncy support you can turn to even out wear.
- Firm support for back & front sleepers
- Springs adapt to each sleeper
- Flip it to even out wear
£575
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The Wentworth Mercer Mercer 3000 Pocket Pro is a firm, 32cm deep pocket spring mattress with wool, cashmere and silk comfort layers over two layers of mini springs. It's double-sided, so you can flip it, and it's made in the UK. It suits sleepers who want firm support with a springy feel. It comes in a UK single, UK double, UK king and UK super king. Mattress Online offers a 100-night comfort trial, and Wentworth Mercer gives a 10-year guarantee.
Mattress specifications
Firmness
Firm
Type
Pocket Spring
Depth (cm)
32
Number of Layers
5
Trial Period (nights)
Warranty (years)
Price Range
£575 to £945
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Certifications
BS 7177
Assessed from the specification published by mattressonline.co.uk, captured November 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
The firm feel gives solid support, which suits back and front sleepers and heavier sleepers who want to stay lifted on top of the mattress. The core of pocket springs adapts to the movement and weight of each sleeper, and the mini spring layers add bounce. Wool, cashmere and silk sit at the top, with a cotton and polyester layer that wicks moisture. It's double-sided and hand side-stitched, and the tufted, glue-free construction suggests careful building. Flipping it helps spread wear, although the weight of a mattress this deep makes turning a two-person job.
Key features & layer details
Wool, cashmere and silk layers
Two layers of a wool, cashmere and silk blend sit at the top. They add a cosy, soft-touch surface over the firm feel beneath.
Polyester fibre layers
Two layers of polyester fibres add to the comfort layer. They give a little extra cushioning between the surface and the springs.
Cotton and polyester layers
A blend of cotton and polyester forms two moisture-wicking layers. They help draw moisture away as you sleep.
Mini pocket springs
Two layers of 1000 mini springs add a bouncy feel. You get a springier, more responsive surface over the core.
Pocket spring core
A core of 1000 pocket springs adapts to the movement and weight of each sleeper. That means support tailored to your body, and the firm feel is rooted here.
Layer details from mattressonline.co.uk product page, November 2026.
Best suited for?
Back sleepers
The firm feel gives solid support, so your body stays lifted on top of the mattress rather than sinking into it.
Front sleepers
A firm surface over a core of 1000 pocket springs keeps your body lifted, which suits anyone lying on their front.
Heavier sleepers
The pocket spring core adapts to the weight of each sleeper, while the firm rating keeps you lifted on top of the mattress.
Warm sleepers
Two moisture-wicking layers of cotton and polyester help draw moisture away as you sleep, which should keep the surface feeling fresher.
If you prefer sleeping on a soft or medium mattress, this might not be the best choice. It's rated firm, so lighter side sleepers may find it doesn't cushion the shoulders and hips enough. It's also a deep, heavy build to turn, and Wentworth Mercer doesn't publish a weight for it, so check you can manage the flipping.
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.
Wentworth Mercer Mercer 3000 Pocket Pro Mattress
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FAQ's
How firm is the Wentworth Mercer Mercer 3000 Pocket Pro?
It's rated firm. That suits back and front sleepers and heavier sleepers who want a supportive surface, but lighter side sleepers may find it too unyielding at the shoulders and hips.
What sizes does the Wentworth Mercer Mercer 3000 Pocket Pro come in?
It comes in a UK single, UK double, UK king and UK super king. It isn't listed in a UK small single or UK small double.
How deep is the Wentworth Mercer Mercer 3000 Pocket Pro?
It's 32cm deep, so it's a fairly tall mattress. Check your bed frame and any fitted sheets suit that depth, particularly if you have a high divan base.
Can you flip the Wentworth Mercer Mercer 3000 Pocket Pro?
Yes, it has a double-sided design and is made to be flipped. Turning it regularly helps spread wear evenly, though a deep mattress like this is easier to turn with two people.
Does the Wentworth Mercer Mercer 3000 Pocket Pro come with a trial or guarantee?
Mattress Online offers a 100-night comfort trial, but you need to buy a mattress protector from Mattress Online with the mattress to be eligible. Wentworth Mercer gives a 10-year guarantee.
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