Wentworth Mercer Pocket Pro 1500 Mattress
The Wentworth Mercer Pocket Pro 1500 Mattress has 1500 pocket springs under a wool, cashmere and silk blend, which means firm, responsive support with a soft natural layer on top.
- Firm feel for back sleepers
- Handcrafted in the UK
- Glue-free build, easier to recycle
£449
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The Wentworth Mercer Pocket Pro 1500 is a firm, 29cm deep pocket spring mattress, handcrafted in the UK. A wool, cashmere and silk blend sits over polyester fibre and cotton layers, and it can be flipped as well as rotated. It suits sleepers who want a firm feel, and comes in a UK single, UK double, UK king and UK super king. Mattress Online offers a 100-night trial, and the guarantee is 10 years.
Mattress specifications
Firmness
Firm
Type
Pocket Spring
Depth (cm)
29
Number of Layers
4
Trial Period (nights)
Warranty (years)
Price Range
£449 to £735
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?
This is a firm mattress built around 1500 pocket springs, which respond to your weight and movement so support comes where you need it. The wool, cashmere and silk top adds some plush comfort without changing the firm rating, and the polyester fibre layers give a breathable feel. It's double-sided, so you can rotate and flip it seasonally to spread wear. Hand tufting and a hand side stitched border point to careful construction, and the glue-free build makes it easier to recycle. It suits back sleepers and anyone who prefers a firm surface, although lighter side sleepers may find it a little unyielding.
Key features & layer details
Wool, cashmere and silk blend
Two layers of a wool, cashmere and silk blend for plush comfort. They soften the top of a firm mattress a little without changing its rating.
Breathable polyester fibre
Two layers of polyester fibres that create a breathable feel, so the surface should feel less stuffy.
Polyester and cotton blend
Two supportive layers of a polyester and cotton blend, which add comfort and support between the soft top and the springs.
Pocket springs
A core of 1500 pocket springs in cloth pockets. They adapt to your weight and movement, so support comes where you need it.
Layer details from mattressonline.co.uk product page, November 2026.
Best suited for?
Back sleepers
A firm rating and 1500 pocket springs that respond to your weight mean the surface stays supportive and level beneath you.
Warm sleepers
Two layers of breathable polyester fibre give the surface a less stuffy feel, which suits anyone who tends to feel the heat at night.
Eco-conscious buyers
The glue-free build makes this mattress easier to recycle, and the wool, cashmere and silk blend adds natural fibres to the comfort layers.
Couples
Pocket springs in cloth pockets adapt to weight and movement, so each person gets support where they need it, and the range runs up to super king.
If you prefer sleeping on a soft or medium mattress, this might not be the best choice. It's rated firm, and the thin natural fibre layers soften the top only slightly. Side sleepers who want deep cushioning at the shoulders and hips may find it too firm. Flipping a mattress also takes some effort, especially in the larger sizes.
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 Pocket Pro 1500 Mattress
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FAQ's
How firm is the Wentworth Mercer Pocket Pro 1500?
It's rated firm. The wool, cashmere and silk top adds some plush comfort, but the overall feel stays firm, so it suits sleepers who want a supportive surface more than a soft one.
What sizes does the Wentworth Mercer Pocket Pro 1500 come in?
It comes in a UK single, UK double, UK king and UK super king. Each size is listed at 29cm deep. A UK small single and UK small double aren't listed.
How deep is the Wentworth Mercer Pocket Pro 1500?
It's 29cm deep in every size. That's enough for a spring core plus the layers of natural and polyester fibres on top, and it should suit most standard bed frames.
Can you flip the Wentworth Mercer Pocket Pro 1500?
Yes, it's double-sided, and the maker suggests rotating and flipping it seasonally. This helps spread wear evenly, which is a practical advantage over mattresses that can only be turned.
Does the Wentworth Mercer Pocket Pro 1500 have a trial or guarantee?
Mattress Online offers a 100-night trial, which needs a mattress protector bought from them. The mattress also has a 10-year guarantee. Check the retailer's terms before you buy.
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