Wentworth Mercer Premium 9000 Pocket Pillow Top Mattress
The Wentworth Mercer Premium 9000 Pocket Pillow Top Mattress layers a plush pillow top with mini pocket springs over a pocket spring core, which means a sink-in surface with medium support beneath.
- Plush sink-in pillow top feel
- Supportive reinforced edges
- Natural wool, cotton & silk filling
£1,129
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This is a premium pocket spring mattress with a pillow top, rated medium and 34cm deep. The top layer is filled with natural fibres and mini springs for a sink-in feel, and it sits over 1,000 pocket springs. It suits sleepers who want a cushioned surface. It comes in UK Single to Super King, and Mattress Online offers a 100-night comfort trial alongside an 8-year guarantee.
Mattress specifications
Firmness
Medium
Type
Pocket Spring
Depth (cm)
34
Number of Layers
2
Trial Period (nights)
100
Warranty (years)
8
Price Range
£1,129 to £2,269
Best Sleeping Position(s)
Back Sleeping
Combination Sleeping
Side Sleeping
Certifications
BS 7177
Assessed from Wentworth Mercer's published specification for this mattress, captured October 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
The pillow top is packed with natural fibres and mini springs, so you get a plush, sink-in surface rather than a flat, firm one. Underneath, 1,000 pocket springs give the mattress its medium feel and a steady base. A reinforced edge with butterfly border springs means the sides should hold up when you sit on them or sleep near them. The cover is chemical-free (treatment-free), and the mattress is made in the UK. It suits most sleepers who like a soft-topped bed, although anyone who wants a very firm feel will find the pillow top too yielding.
Key features & layer details
Pillow top comfort layer
A plush pillow top packed with natural fibres and mini springs, giving a sink-in feel. It means a soft, cushioned surface that eases you into the mattress.
Pocket spring core
1,000 traditional pocket springs form the heart of the mattress, with 8,000 mini pocket springs blended into the comfort filling layers. That gives the medium feel and a supportive base under the softer top.
Layer details from wentworthandmercer.com product page, October 2026.
Best suited for?
Side sleepers
The pillow top of natural fibres and mini springs gives a plush, sink-in surface, which means shoulders and hips can ease into the mattress.
Couples
A reinforced edge with butterfly border springs should hold up when you sit on the sides or sleep near them, so both people can use the full width.
Eco-conscious buyers
A chemical-free, treatment-free cover and natural fibres in the pillow top suit anyone who wants a UK-made mattress with fewer added treatments.
Guest rooms
A medium feel from 1,000 pocket springs under a soft top is comfortable for most visitors, and the 100-night trial is there if it isn't right.
If you prefer sleeping on a firm mattress, this might not be the best choice. The pillow top is designed to give a sink-in feel, and the overall rating is medium. It's also single-sided, so it can't be flipped and you're limited to rotating it. Wentworth Mercer makes no specific cooling claims for it.
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 Premium 9000 Pocket Pillow Top Mattress
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FAQ's
How firm is the Wentworth Mercer Premium 9000 Pocket Pillow Top?
It's rated medium. The pillow top adds a plush, sink-in layer over the springs, so the surface feels softer than the rating alone suggests. Sleepers who want a very firm bed may find it too cushioned.
What sizes does the Wentworth Mercer Premium 9000 Pocket Pillow Top come in?
It comes in UK Single (90x190cm), Small Double (120x190cm), Double (135x190cm), King (150x200cm) and Super King (180x200cm). Wentworth Mercer's own page doesn't list sizes for this model, so these come from the retailer.
How deep is the Wentworth Mercer Premium 9000 Pocket Pillow Top?
It's 34cm deep. That's a substantial mattress, so if your bed frame has a low headboard or high sides, check the clearance before you buy.
What is inside the Wentworth Mercer Premium 9000 Pocket Pillow Top?
The core has 1,000 traditional pocket springs, and 8,000 mini pocket springs are blended into the comfort layers, making 9,000 in total. The fillings are wool, cotton, silk and soft white fibres, so it's a springs-and-fibres build.
Does the Wentworth Mercer Premium 9000 Pocket Pillow Top come with a trial or guarantee?
Mattress Online offers a 100-night comfort trial, and an 8-year guarantee is stated for this mattress. The trial is the retailer's own offer, so check its conditions before you order.
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