Millbrook Smooth Tech Ultra 10000 Pocket Small Double Mattress
The Millbrook Smooth Tech Ultra 10000 is a pocket spring mattress with a soft to medium feel, which means it suits sleepers who want gentle cushioning rather than a firm surface.
- Softer feel suits side sleepers
- Contours closely to shoulders & hips
- Natural fibres reduce heat build-up
£1,338
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Millbrook Smooth Tech Ultra 10000 Pocket Mattress
More available sizes
Mattress details
Mattress
Millbrook Smooth Tech Ultra 10000 Pocket Mattress
Size
Firmness
Medium Soft
Construction
Pocket Spring
Wool
Natural
Depth (cm)
35
Layers
3
Layer Details
Microquilted Cover
A micro-quilted cover gives the mattress a smooth, soft finish. It's the first thing you'll feel through your sheet, and it sets the gentle tone for the layers beneath.
Comfort Layer
A blend of wool, silk, cashgora and cotton designed for a cloud-like feel. These natural fibres also breathe well, which means less overnight heat build-up than synthetic alternatives.
Pocket Springs Support System
2,000 regular pocket springs work alongside 8,000 mini springs, each stitched into its own individual fabric pocket. Because every spring moves independently, the mattress can relieve pressure where you need it rather than pushing back uniformly.
Layer details from mattressonline.co.uk product page, September 2026.
Key benefits
- Space to spread out alone: At 30cm wider than the UK single and the same length, it gives one person room to shift position freely on that soft, contouring surface.
- Fits rooms a double would crowd: It's 15cm narrower than the UK double, which can be the difference between a walkway beside the bed and shuffling in sideways.
- A gentle feel that rewards the extra width: The 2,000 pocket springs and 8,000 mini springs respond point by point, so a solo sleeper who roams the bed gets cushioning wherever they end up.
- Natural fillings for warm sleepers: Wool, silk, cashgora and cotton breathe better than synthetic foam, useful in the smaller, sometimes stuffier rooms this size tends to live in.
- Standard 4ft sizing: The small double is a common UK size, so frames and fitted sheets are easy to find, paired with a standard double duvet.
This size suits you if...
You sleep alone and have outgrown a single but can't spare the floor space a double demands, you're replacing a teenager's bed in a room that still needs space for a desk, or you're furnishing a guest room or holiday let where couples stay for a night or two rather than living there.
Consider another size if...
Your room measures less than the 2.4m x 2.8m we suggest, or the bed is for a child who doesn't need the width yet. We'd recommend the UK single instead, for which we suggest at least 2.1m x 2.8m.
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FAQ's
Will the Millbrook Smooth Tech Ultra 10000 small double fit in a box room?
Often, yes. The mattress is 120 x 190cm, and we suggest a room of at least 2.4m x 2.8m so you can still open the door and walk around the bed. Measure with wardrobes and radiators in mind, since it's usually the width of the room, rather than the length, that decides it.
How much bigger is the UK small double than the UK single in this Millbrook mattress?
The UK small double is 30cm wider than the UK single, and the two are exactly the same length at 190cm. That extra width is the whole point of the size: you gain genuine sprawling room without the bed taking up any more of the room's length.
Is the UK small double the largest size the Millbrook Smooth Tech Ultra 10000 comes in?
Yes. This mattress is made in the UK single and UK small double only, so there's no UK double or UK king to size up to. If you share a bed every night and want more than 120cm between you, you'd need a different mattress rather than a different size of this one.
Can a couple sleep on the Millbrook Smooth Tech Ultra 10000 small double every night?
For occasional stays, it works, which is why this size suits guest rooms. Nightly is harder: 120cm across is snug for two adults, and the medium soft feel lets you settle into the surface, so you'll notice a partner's presence more than on a firmer bed. Solo use is where this size makes sense.
Where can I compare prices for the small double Millbrook Smooth Tech Ultra 10000?
Use the price table on this page. The prices shown here are updated as retailers change them, so it's a quicker route than checking each site yourself, and you can see at a glance who currently stocks the UK small double.