Wentworth Mercer Deluxe Naturals 5000 Pocket Small Double 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
£999
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Wentworth Mercer Deluxe Naturals 5000 Pocket Mattress
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Mattress details
Mattress
Wentworth Mercer Deluxe Naturals 5000 Pocket Mattress
Size
Firmness
Medium Soft
Construction
Pocket Spring
Wool
Depth (cm)
29
Layers
4
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.
Key benefits
- Room to spread out alone: At 30cm wider than the UK single, you can sleep diagonally or starfish without an arm dropping off the edge.
- Fits a tighter double room: Being 15cm narrower than the UK double leaves a little more floor beside the bed, which matters when a wardrobe door or bedroom door needs to swing open.
- Soft feel for lighter bodies: The medium soft comfort layers cushion shoulders and hips, which suits a solo side sleeper or a teenager who has outgrown their single bed.
- Cooler sleep in small rooms: The wool and cotton fillings wick away moisture, which means you're less likely to wake clammy in a snug room with little airflow.
- Calmer for occasional guests: Independent pocket springs reduce the jolt when one person turns over, so a visiting couple should disturb each other slightly less on a narrow bed.
This size suits you if...
You sleep alone and want more room than a single gives, your bedroom is a loft conversion or small second room where a full double would crowd the floor, or you're furnishing a guest room that hosts couples only now and then.
Consider another size if...
You share the bed with a partner every night. We'd recommend the UK double instead, which gives 67.5cm each for two sharing; we suggest at least 2.6m x 2.8m for it.
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FAQ's
Is the Deluxe Naturals 5000 UK small double big enough for one adult?
For most solo sleepers, yes. It is 120 x 190cm, 30cm wider than the UK single, so you can turn and stretch freely. The length is the same as a single, though, so if you're tall and your feet already reach the end of a 190cm bed, the extra width won't help with that.
Will a Deluxe Naturals 5000 small double fit in a loft conversion?
Often, yes, as long as there's enough headroom where you'll climb in and out. We suggest a room of at least 2.4m x 2.8m for a UK small double. In a loft with sloping ceilings, measure the standing height on the side you'll get up from, as well as the floor area.
Can a couple share the Deluxe Naturals 5000 UK small double for a weekend?
For a night or two, most couples manage. The pocket springs reduce the movement you feel when a partner shifts, which helps on a narrower bed. The soft top layers can let you roll slightly towards each other, though, so it's better for visiting guests than for nightly sharing.
Deluxe Naturals 5000: UK small double or UK double?
Choose the UK small double if you sleep alone or your room is tight, since it is 15cm narrower than the UK double. Choose the UK double if two of you sleep in it every night. It gives 67.5cm each, and we suggest at least 2.6m x 2.8m for it.
Is the Deluxe Naturals 5000 small double good for a teenager moving up from a single?
It's a sensible step up. A growing teenager gets 30cm more width than a UK single without losing much extra floor space, and the medium soft feel suits lighter bodies well. If your teenager is heavy or sleeps on their front, this mattress may feel too yielding, whatever the size.