Wentworth Mercer Mercer 3000 Pocket Pro Double 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
£735
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Wentworth Mercer Mercer 3000 Pocket Pro Mattress
More available sizes
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
- Leaves room for the rest of your furniture: At 135 x 190cm, the UK double fits alongside a wardrobe and a chest of drawers in many bedrooms where a UK king would swallow the floor.
- Space for a bedside table each: In a room of around 3m x 3m, you should still fit a bedside table on both sides, so neither of you gives up a lamp or a glass of water.
- Firm support on each side: The pocket spring core responds to each sleeper's weight separately, which means you both get the firm, lifted feel even if one of you is a good deal heavier.
- Flipping is a job for two: It's double-sided and 32cm deep, so turning a UK double takes two people, which is easier when you share the bed and can do it together.
- Bedding is easy to buy: Standard double sheets fit, and a 200 x 200cm double duvet gives you both enough cover without one person waking up half exposed.
This size suits you if...
You share the bed with a partner in a typical UK bedroom and want to keep space for a wardrobe and bedside tables. It also suits you if you're furnishing a guest room for visiting couples who sleep well on a firm mattress.
Consider another size if...
You both move around a lot at night and your room has space to spare. We'd recommend the UK king instead, which gives 75cm each. Allow at least 2.7m x 2.9m for it.
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FAQ's
Is the Mercer 3000 Pocket Pro UK double big enough for two people?
For most couples, yes. The UK double gives you 67.5cm each, which works if you both sleep fairly still. If one of you sprawls, the UK king gives 75cm each, so the UK double gives 7.5cm less per person. That gap is small, but you'll notice it on restless nights.
What size bedroom do I need for a Wentworth Mercer 3000 Pocket Pro double?
We suggest at least 2.6m x 2.8m for the UK double. Around 3m x 3m is more comfortable, as it leaves room to walk round the bed and keep a bedside table on each side. In a smaller second bedroom, measure where the wardrobe doors open before you commit.
How big is the Mercer 3000 Pocket Pro double in feet and inches?
The UK double measures 4ft 6in x 6ft 3in, which is 135 x 190cm. That's the standard UK double size, so a bed frame or divan sold as a UK double should take it. At 32cm deep, it sits quite high on the frame.
Should I choose the UK double or UK king Mercer 3000 Pocket Pro?
The UK double is 15cm narrower and 10cm shorter than the UK king. Choose the UK double if your room is tight or you want space for furniture. The UK king suits taller sleepers and couples who want more room, but allow at least 2.7m x 2.9m for it.
What bedding fits a UK double Mercer 3000 Pocket Pro?
Double sheets fit the UK double, and a 200 x 200cm double duvet gives you both enough cover. The mattress is 32cm deep, so check that any fitted sheet you buy is made for deep mattresses. A standard-depth sheet may pull off the corners.