Firmness
Medium Firm
Type
Pocket Spring
Depth (cm)
29
Number of Layers
3
Trial Period (nights)
100
Warranty (years)
5
Price Range
£379 to £689
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
This is a sensible pick if you want a traditional pocket sprung feel without a big price tag. The 1000 individual pocket springs move independently, which means the mattress responds to your body shape rather than pushing back as one solid unit, and the design is intended to give greater bounce-back. Above the springs, layers of soft white fibres help air move through the mattress, useful if you tend to sleep warm. The natural touches, cotton fillings and wool tufts, are modest at this price, but they're welcome. It carries National Bed Federation approval and conforms to BS7177: 2008 for fire resistance, so the essentials are properly certified.
Key Features & what's inside
- Comfort fillings. Two layers combining polyester and cotton sit at the sleep surface, which means a soft, cushioned first impression when you lie down. The cotton adds a touch of natural breathability to the synthetic fill.
- Soft white fibres. Beneath the comfort layers, two layers of soft white fibres help air circulate through the mattress. This works to move heat and moisture away from you, so the bed feels fresher for longer.
- Pocket springs. 1000 pocket springs form the core of the mattress, each moving independently to follow the shape of your body. Their curved design is intended to react quickly and spring back, so the mattress shouldn't feel dead or unresponsive when you change position.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you prefer a properly firm mattress, this one is listed as medium, so it may feel softer than you'd like, particularly if you're a heavier back or stomach sleeper. Equally, if you want memory foam contouring or a deep, hotel-style pillow top, a traditional sprung design like this won't give you that sink-in feel.
Wentworth Mercer Natural Pocket 1000 Mattress
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How firm is the Wentworth Mercer Natural Pocket 1000?
The product page lists it as medium. That suits most sleepers, although lightweight side sleepers may still find pocket sprung mattresses a little firmer-feeling than foam alternatives, and heavier people who want strong pushback may prefer something firmer.
Does the Wentworth Mercer Natural Pocket 1000 come with a trial?
Mattress Online lists a 100-night trial with this mattress. Do note the condition: the trial requires you to buy a mattress protector from Mattress Online to be eligible. It's the retailer's offer rather than the manufacturer's, so terms may differ if you buy elsewhere.
What guarantee does the Wentworth Mercer Natural Pocket 1000 have?
Mattress Online lists a 5 year guarantee with this mattress. As this appears on a retailer listing rather than the brand's own site, check the guarantee terms with whichever retailer you buy from.
How deep is the Wentworth Mercer Natural Pocket 1000 mattress?
It's 29cm deep. That's a reasonably generous depth for a pocket sprung mattress at this price, though it's worth checking your fitted sheets will stretch to accommodate it.
What sizes does the Wentworth Mercer Natural Pocket 1000 come in?
It's available in UK Single, UK Double, UK King and UK Super King, with prices ranging from £379 to £689 depending on the size you choose.
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