Wentworth Mercer Deluxe Wool 3000 Pocket Small Double Mattress
The Wentworth Mercer Deluxe Wool 3000 Pocket Mattress pairs 3000 pocket springs with natural wool and soft synthetic fillings, which means responsive support underneath and a plush, breathable feel on top.
- Wool helps in summer & winter
- Support tailored to each partner
- Plush, cosy surface feel
£749
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Wentworth Mercer Deluxe Wool 3000 Pocket Mattress
More available sizes
Mattress details
Mattress
Wentworth Mercer Deluxe Wool 3000 Pocket Mattress
Size
Firmness
Medium Firm
Construction
Pocket Spring
Wool
Natural
Depth (cm)
29
Layers
3
Layer Details
Soft White Fibres
Soft synthetic fillings topped with a polyester layer, which means a cosy surface feel the moment you lie down. They're inherently breathable, so this comfort layer shouldn't hold onto heat.
Wool
A generous layer of natural wool fibres gives deep, plush comfort. Wool is naturally temperature-regulating, which means it works all year round, warming in winter and wicking heat in summer.
Pocket Springs
3000 traditional pocket springs made from twice tempered steel, which means each spring responds to your body shape independently rather than the whole surface moving as one. The result is strong, personalised support and less partner disturbance.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Room to sprawl on your own: The UK small double is 30cm wider than the UK single, which means you can lie diagonally or spread your arms without hitting the edge.
- Fits tighter bedrooms: Being 15cm narrower than the UK double, the UK small double can leave just enough clearance for a door or wardrobe to open in a box room or studio.
- Calmer shared nights for guests: Each spring moves independently, so an occasional couple in a guest room feels a little less of each other's tossing and turning on the narrower surface.
- Suits smaller second bedrooms: We suggest a room of at least 2.4m x 2.8m, a footprint many small second bedrooms in rentals and holiday lets can manage.
This size suits you if...
You sleep alone and want more room than a single gives, or your bedroom is too tight for a 4ft 6in frame but you still want a proper double for guests who stay now and then.
Consider another size if...
You and a partner will share the bed every night. We'd recommend the UK double instead, which gives 67.5cm each; we suggest at least 2.6m x 2.8m for the UK double.
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FAQ's
Is the Wentworth Mercer Deluxe Wool 3000 small double big enough for one adult?
For most solo sleepers, yes. At 120cm wide, the UK small double is 30cm wider than the UK single, so there is room to shift position freely. It runs 190cm long (6ft 3in). If you are tall and your feet reach the end, the UK king is 10cm longer.
Will a Wentworth Mercer small double fit in a box room?
Often, yes. We suggest a room of at least 2.4m x 2.8m for the UK small double. Measure where your door swings and where drawers pull out, because the 15cm you save against the UK double can decide whether both still open comfortably.
Can a couple share the Wentworth Mercer Deluxe Wool 3000 small double every night?
It works for occasional stays, and the pocket springs help limit movement crossing between you. Nightly, it gets tight. The UK double gives 67.5cm each for two sharing and the UK king gives 75cm each, so either suits a couple better.
Should I buy the small double or single for a teenager's room?
If the room allows it, the UK small double gives a growing teenager 30cm more width at the same length. The trade-off is floor space: we suggest at least 2.4m x 2.8m for the UK small double, against at least 2.1m x 2.8m for the UK single.
Is a small double a good choice for a loft conversion bedroom?
It can be. Sloping ceilings often leave little standing room beside the bed, and the UK small double is 15cm narrower than the UK double, giving you slightly more usable floor along the side where you can stand upright. Measure the full-height area before choosing.