Wentworth Mercer Deluxe Naturals 5000 Pocket Mattress
The Wentworth Mercer Deluxe Naturals 5000 is a soft to medium pocket spring mattress with natural wool and cotton fillings, handcrafted in the UK.
- Cool in summer, warm in winter
- Minimises partner disturbance
- Gentle feel suits side sleepers
£769
Get the lowest price we've found
At 29cm deep with 5000 twice tempered steel pocket springs, the Wentworth Mercer Deluxe Naturals 5000 is built for sleepers who want a gentler, cushioned feel rather than a firm surface. It comes in five UK sizes, from Single to Super King. It's sold through Mattress Online, which lists a 100-night trial and a 5-year guarantee, although the trial requires buying a mattress protector from them. A soft to medium feel suits side sleepers and lighter bodies best; heavier back or front sleepers may want firmer support.
Mattress specifications
Firmness
Medium Soft
Type
Pocket Spring
Depth (cm)
29
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
5
Price Range
£769 to £1,399
Best Sleeping Position(s)
Side 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?
The appeal here is natural fillings at a mid-range price. Wool and cotton layers regulate temperature and wick moisture, which means you're less likely to overheat in summer or feel clammy overnight. Underneath, 5000 pocket springs move independently, so you'll feel less disturbance when a partner shifts position. It carries National Bed Federation approval and is handcrafted in the UK, which offers some reassurance on build quality. The soft to medium feel is genuinely on the gentler side, lovely if you sleep on your side, less ideal if you need firm support. Mattress Online's listed terms include free delivery to most locations and a 100-night trial, protector purchase required.
Key features & layer details
Wool
Natural wool fibres with temperature regulating properties, which means the mattress helps you stay cool in summer and warm in winter. Wool is a genuinely useful top layer for anyone who runs hot at night.
Cotton
Natural cotton fibres keep the sleeping surface fresh, regulating body temperature and wicking away moisture. In practice, this means a drier, more breathable feel than all-synthetic comfort layers.
Soft White Fibres
Soft synthetic fillings that create a cosy, cushioned feel. They're durable and resilient, so the layer should hold its shape rather than flattening quickly.
Pocket Springs Support System
5000 pocket springs made from twice tempered steel, each encased in its own fabric pocket so it moves independently. That means support that follows your body's shape, with less motion transfer across the bed.
Layer details from mattressonline.co.uk product page, September 2026.
Best suited for?
Side sleepers
The medium soft feel and cushioned fibre layer ease pressure at the shoulder and hip, which makes the gentler surface a comfortable fit when lying on your side.
Warm sleepers
Natural wool and cotton layers regulate temperature and wick away moisture, which means you are less likely to overheat in summer or feel clammy overnight.
Couples
Each of the 5000 pocket springs sits in its own fabric pocket and moves independently, so you will feel less disturbance when a partner shifts position.
Lighter sleepers
A soft to medium feel suits lighter bodies best, as they can sink gently into the cushioned top layers without the surface feeling too firm.
Eco-conscious buyers
Natural wool and cotton fillings are used in the comfort layers, and the mattress is handcrafted in the UK, which suits anyone who prefers natural materials.
If you prefer a firm surface, or you're a heavier back or front sleeper who needs more pushback, the soft to medium feel here will likely feel too yielding. The listed trial also depends on buying a protector from Mattress Online.
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 Deluxe Naturals 5000 Pocket Mattress
Select a comparison article below or choose to compare this mattress side by side with up to 2 other mattresses.
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
How firm is the Wentworth Mercer Deluxe Naturals 5000?
It's described as soft to medium, so it sits on the gentler side of the scale. That cushioned feel suits side sleepers and lighter bodies well, but if you sleep on your front or need firmer spinal support, you may find it a little too soft.
Does the Deluxe Naturals 5000 come with a trial period?
Mattress Online lists a 100-night trial with this mattress, but it requires purchasing a mattress protector from them at the same time. This is the retailer's own offer rather than a brand-wide policy, so check the terms carefully before you buy.
What is the Deluxe Naturals 5000 made of?
It combines natural wool and cotton layers with soft white synthetic fibres over 5000 pocket springs made from twice tempered steel. The mattress is 29cm deep, handcrafted in the UK, and Wentworth Mercer is a National Bed Federation approved brand.
What guarantee does the Wentworth Mercer Deluxe Naturals 5000 have?
Mattress Online lists a 5-year guarantee, and its page also mentions an additional 5-year warranty on top of that. These are the retailer's stated terms, so confirm the details with them directly before ordering.
What sizes does the Deluxe Naturals 5000 come in?
Five UK sizes: Single, Small Double, Double, King and Super King. Mattress Online lists free delivery to most locations, with next day weekday delivery available, paid room-of-choice delivery and old mattress removal for an extra charge.
Couldn't find an answer to your question? Send us a message