Millbrook Wool Sublime Firm Pocket 8000 Small Double Mattress
The Millbrook Wool Sublime Firm Pocket 8000 is a pocket sprung mattress from Millbrook, a British brand with a long association with natural wool fillings.
- Pocket-sprung support
- Traditionally made
- Sizes to fit unusual bed frames
£1,244.23
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Millbrook Wool Sublime Firm Pocket 8000 Mattress
More available sizes
Mattress details
Mattress
Millbrook Wool Sublime Firm Pocket 8000 Mattress
Size
Firmness
Firm
Construction
Pocket Spring
Wool
Depth (cm)
Layers
2
Layer Details
Natural fillings
Deep layers of Hampshire wool, cashgora wool, silk and soft English spun cotton sit on top. These natural fibres give the firm feel a softer, more cushioned surface, though the mattress as a whole stays firm.
Pocket spring interior
The core is 2000 inner pocket springs, with a 1000 and a 2000 tablet comfort layer of pocket springs on either side. Because the springs work independently, you get steady support across the bed, and the double-sided build means it can be flipped and rotated.
Layer details from archerssleepcentre.co.uk and bedconnect.co.uk product pages, October 2026.
Key benefits
- Real space for one: At 30cm wider than the UK single, this size lets a solo adult stretch out properly without committing to double-sized floor space.
- Fits compact bedrooms: Being 15cm narrower than the UK double, it suits box rooms, loft conversions and studio flats where every centimetre beside the bed counts.
- A premium option in a modest footprint: Millbrook's pocket sprung construction with wool fillings usually appears in larger sizes, so this small double suits buyers who want quality without the bulk.
- Handles occasional sharing: For a guest room used by visiting couples a few nights a year, 120cm across is workable, even if it would feel tight nightly.
- Standard UK size for frames and bedding: The 4ft small double is a standard UK size, so fitted sheets and bed frames are easy to find on the high street.
This size suits you if...
You sleep alone and have outgrown a single but can't spare the floor space a double demands, your bedroom, loft room or studio is around our suggested minimum of 2.4m x 2.8m, or you're furnishing a guest room or holiday let where couples stay occasionally rather than every night.
Consider another size if...
You share the bed every night, as 120cm across leaves two adults short of space. The UK double gives 67.5cm each for two sharing, and we suggest a room of at least 2.6m x 2.8m for it.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Is a small double big enough for one adult on the Millbrook Wool Sublime Firm Pocket 8000?
Comfortably, yes. The UK small double is 30cm wider than the UK single at the same 190cm length, so an adult who likes to spread out gets meaningful extra room. Given this is a firmer pocket sprung mattress, a solo sleeper who moves around a lot may particularly appreciate the added width.
Will the Millbrook Wool Sublime Firm Pocket 8000 small double fit in a box room?
Often, and that's the point of the size. At 120 x 190cm, we'd allow a room of at least 2.4m x 2.8m so the door still clears and you can walk around the bed. Measure with the frame included, as headboards and side rails add several centimetres beyond the mattress itself.
Can a couple sleep on the small double version of this mattress?
For occasional nights, yes, which makes it a sensible guest room choice. As an every-night bed for two, 120cm across is a squeeze, and a firm mattress makes shared space feel tighter because you sink into it less. Regular sharers would do better sizing up to the UK double, which gives 67.5cm each.
How much wider is the small double than a single?
The UK small double is 30cm wider than the UK single, and the two are the same length at 190cm. That extra width is the whole appeal for a teenager or adult who has outgrown a single bed but whose room can't take a full double frame.
Where can I buy the Millbrook Wool Sublime Firm Pocket 8000 in a UK small double?
Stock for this model is thinner on the ground than for mainstream brands, so compare the retailers listed on this page, where prices are updated as retailers change them. Because full construction details aren't widely published, it's also sensible to confirm specifics like fillings and spring count with the retailer before ordering.