Wentworth Mercer Natural Pocket 1500 Mattress
The Wentworth Mercer Natural Pocket 1500 is a medium to firm pocket spring mattress, handcrafted in the UK.
- Minimises partner disturbance
- Cotton wicks away moisture
- Holds its shape without dips
£404
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The Wentworth Mercer Natural Pocket 1500 combines 1500 individual pocket springs with cotton, polyester and soft white fibre comfort layers, finished with wool tufts, in a 29cm deep build. The medium to firm feel suits back sleepers and anyone who likes a supportive surface with a little cushioning on top, although dedicated side sleepers who prefer a softer sink-in feel may find it a touch firm. It comes in four sizes, from UK Single up to UK Super King.
Mattress specifications
Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
29
Number of Layers
3
Trial Period (nights)
100
Warranty (years)
5
Price Range
£404 to £644
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
BS 7177
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
This mattress sits in a sensible middle ground: natural fibres up top, a 1500 pocket spring core underneath, which means each spring responds to your body independently rather than the whole surface moving when your partner does. The cotton in the comfort layers helps wick away moisture, useful if you tend to sleep warm. It carries a 5 year guarantee and is made by a National Bed Federation Approved Brand, conforming to BS7177: 2008 for fire resistance. It is fairly priced for a handcrafted UK pocket spring mattress. Mattress Online offers a 100-night trial, which takes some risk out of buying unseen.
Key features & layer details
Cotton and Polyester Blend
Two layers blending cotton and polyester fibres, which means cushioned comfort where your body meets the mattress. The cotton wicks away moisture while the polyester increases airflow, helping you stay cooler through the night.
Soft White Fibres
Two layers of soft white fibres that enhance breathability and add durability. In practice, this helps the mattress hold its shape rather than developing dips over time.
Pocket Springs
1500 responsive pocket springs, each sewn into its own fabric pocket before being bonded together, so they can move individually as well as working as a team. This means the springs follow your shape and limit motion transfer from a restless partner.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Back sleepers
The medium firm feel gives a supportive surface with a little cushioning from the cotton and polyester layers, so your body stays level without feeling hard.
Couples
Each of the 1500 pocket springs sits in its own fabric pocket, which limits motion transfer when a restless partner turns over.
Warm sleepers
Cotton in the comfort layers wicks away moisture while the polyester increases airflow, which helps you stay cooler through the night.
Combination sleepers
Responsive pocket springs follow your shape as you change position, so the medium firm surface keeps supporting you whether you turn onto your back or side.
If you like a soft, cradling feel, this medium to firm mattress will probably feel too solid, particularly for lightweight side sleepers. There is no memory foam layer, so those who enjoy a slow, contouring sink should look elsewhere. Anyone wanting a very deep, hotel-style mattress may find 29cm a little modest.
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 Natural Pocket 1500 Mattress
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FAQ's
How firm is the Wentworth Mercer Natural Pocket 1500 mattress?
It is described as medium to firm on the product page. That means a supportive feel with some surface cushioning, which suits back and combination sleepers well, though it may feel a little firm for lightweight side sleepers.
Does the Wentworth Mercer Natural Pocket 1500 come with a trial?
Mattress Online lists a 100-night trial for this mattress. This is the retailer's own offer rather than a manufacturer promise, so if you buy elsewhere, check that retailer's returns terms before ordering.
How many springs does the Natural Pocket 1500 have?
It contains 1500 pocket springs, each enclosed in its own fabric pocket. They respond to pressure individually, which means better contouring to your body and less disturbance when a partner moves.
What guarantee does the Wentworth Mercer Natural Pocket 1500 have?
It comes with a 5 year guarantee, as listed by Mattress Online. Keep your proof of purchase, and check the retailer's terms for what the guarantee covers.
How deep is the Wentworth Mercer Natural Pocket 1500 mattress?
It is 29cm deep. Most standard fitted sheets will fit, but if yours are shallow, it is worth checking the measurements before it arrives.
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