Wentworth Mercer Mercer 3000 Pocket Pro Single Mattress
The Wentworth Mercer Mercer 3000 Pocket Pro Mattress combines a pocket spring core with extra layers of mini springs and a double-sided, flippable build, which means firm, bouncy support you can turn to even out wear.
- Firm support for back & front sleepers
- Springs adapt to each sleeper
- Flip it to even out wear
£575
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Wentworth Mercer Mercer 3000 Pocket Pro Mattress
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Mattress details
Mattress
Wentworth Mercer Mercer 3000 Pocket Pro Mattress
Size
Firmness
Firm
Construction
Pocket Spring
Wool
Depth (cm)
32
Layers
5
Layer Details
Wool, cashmere and silk layers
Two layers of a wool, cashmere and silk blend sit at the top. They add a cosy, soft-touch surface over the firm feel beneath.
Polyester fibre layers
Two layers of polyester fibres add to the comfort layer. They give a little extra cushioning between the surface and the springs.
Cotton and polyester layers
A blend of cotton and polyester forms two moisture-wicking layers. They help draw moisture away as you sleep.
Mini pocket springs
Two layers of 1000 mini springs add a bouncy feel. You get a springier, more responsive surface over the core.
Pocket spring core
A core of 1000 pocket springs adapts to the movement and weight of each sleeper. That means support tailored to your body, and the firm feel is rooted here.
Layer details from mattressonline.co.uk product page, November 2026.
Key benefits
- Fits rooms with little floor to spare: At 3ft x 6ft 3in, the UK single leaves space for a desk, wardrobe or storage, and we suggest a room of at least 2.1m x 2.8m.
- Firm support for one sleeper: The firm rating keeps a back or front sleeper lifted on top of the springs, which suits teenagers and adults who dislike sinking in.
- Room for two beds in a guest room: Two UK singles side by side let guests who aren't a couple sleep separately, each on their own firm, springy surface.
- Flipping is a smaller task: The UK single is the smallest size this mattress comes in, so turning it to spread wear is a little less awkward than turning the larger sizes.
- Cosy surface in a single bed: Wool, cashmere and silk sit at the top, which means a soft touch against the sheets over the firm springs beneath.
This size suits you if...
You sleep alone and want firm support on your back or front, or you're furnishing a teenager's room where a desk and wardrobe also need space. It also suits a spare room that doubles as a study, or a guest room where you'd rather fit two separate beds than one large one.
Consider another size if...
You share the bed most nights, or a lighter child would find a firm mattress hard on the shoulders and hips. For couples, we'd recommend the UK double instead, which gives 67.5cm each; we suggest at least 2.6m x 2.8m.
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FAQ's
Will the Mercer 3000 Pocket Pro UK single fit a bunk bed or mid sleeper?
Possibly not. At 32cm deep, it's a tall mattress, and many bunk, cabin and mid sleeper frames set a maximum mattress depth so the safety rail stays high enough above the surface. Check the frame maker's guidance before you order, because the depth is the same in every size and there's no slimmer version.
What size bedroom do I need for a UK single Mercer 3000 Pocket Pro?
We suggest allowing at least 2.1m x 2.8m. The mattress measures 90 x 190cm, so that leaves room to walk round the bed and open a wardrobe door. In a loft conversion, a UK single's narrow footprint can sit under a sloping ceiling, though the 32cm depth raises the sleeping height.
Is the Mercer 3000 Pocket Pro too firm for a child's single bed?
It may be for younger or lighter children. The mattress is rated firm, and lighter side sleepers can find it doesn't cushion the shoulders and hips enough. The wool, cashmere and silk top softens the feel against the skin, but the support underneath stays firm. Older teens who sleep on their back usually get on better with it.
What sheets fit a 32cm deep UK single mattress?
You'll need a single fitted sheet with a deep skirt, because a standard shallow sheet can ping off the corners of a 32cm mattress. Check the stated pocket depth on the packaging before buying. Duvets are simpler: a standard single duvet at 135 x 200cm fits a UK single as usual.
Can one person flip a UK single Mercer 3000 Pocket Pro?
Wentworth Mercer doesn't publish a weight for this mattress, so we can't say for certain. The UK single is the smallest size it comes in, which helps, but the deep, double-sided build still makes it heavy. If you live alone, ask a friend to help the first time and see how you manage.