Millbrook Wool Sublime Firm Pocket 11000 Super King Mattress
The Millbrook Wool Sublime Firm Pocket 11000 is a pocket-sprung mattress with wool in the mix, sold as a firm feel.
- Firm feel for back sleepers
- Natural wool, silk & cotton fillings
- Flip & rotate to wear evenly
£1,909.02
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Millbrook Wool Sublime Firm Pocket 11000 Mattress
More available sizes
Mattress details
Mattress
Millbrook Wool Sublime Firm Pocket 11000 Mattress
Size
Firmness
Firm
Construction
Pocket Spring
Wool
Depth (cm)
Layers
2
Layer Details
Central pocket springs
A core of 2000 pocket springs, each housed in its own cloth sleeve. This gives the mattress its firm, supportive base, with each spring working on its own rather than moving as one.
Pocket spring tablet comfort layers
Three layers of 1500 pocket spring tablets sit on either side of the core. Because both sides are built the same way, you can flip and rotate the mattress to help it wear evenly.
Layer details from archerssleepcentre.co.uk product page, October 2026.
Key benefits
- 90cm of width each: Two people sharing get 90cm apiece, which means a partner who turns over frequently is far enough away that you barely feel it.
- 30cm wider than a UK king: That's 15cm more space each than the UK king, a difference you notice most on nights when one of you can't settle.
- Room for the whole household: When children or a large dog treat your bed as theirs, the extra width means the adults still get a reasonable share.
- Firm feel across a wide surface: A firm pocket-sprung build over 180cm of width means each sleeper's movement is absorbed locally rather than travelling across the bed.
- Made for larger bedrooms: A UK king can look undersized in a big master or period bedroom; the UK super king fills the space in proportion.
This size suits you if...
You share the bed every night and want the most space a standard UK size offers, your partner is genuinely restless and distance matters more than any comfort layer, or children and pets regularly join you and everyone still needs room to sleep. Your bedroom should measure at least 3m x 2.9m for this size to work comfortably.
Consider another size if...
Your room is under our suggested 3m x 2.9m minimum, or you'd struggle to get a 6ft-wide mattress up your stairs. We'd recommend the UK king instead: it's the same length, 30cm narrower, and needs at least 2.7m x 2.9m.
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FAQ's
How big is the Millbrook Wool Sublime Firm Pocket 11000 in a super king?
It measures 180 x 200cm, or 6ft x 6ft 6in. That gives two people sharing 90cm of width each, the most of any standard UK size. Millbrook doesn't publish depth or weight figures for this mattress, so check the retailer's listing if either matters for your bed frame or stairs.
Is the super king worth it over the king for this mattress?
If sleep disturbance is your problem, usually yes. The UK super king is 30cm wider than the UK king at the same length, giving each sleeper 15cm more. Combined with the firm pocket-sprung build, which keeps movement localised, a restless partner becomes much easier to ignore. If your room is tight, the UK king is the sensible compromise.
Will a super king Millbrook Wool Sublime fit in my bedroom?
We suggest a room of at least 3m x 2.9m, and that's our guidance rather than Millbrook's. Before buying, check the awkward bits too: door swing, landing turns and any tight stair angles, because a 180cm-wide mattress is the hardest standard size to manoeuvre upstairs.
Is this super king suitable for co-sleeping with children?
Size-wise it's the best case: 90cm each for two adults means a child wandering in at night doesn't leave anyone clinging to the edge. Bear in mind this is sold as a firm feel, which some young children find hard; that's a preference call rather than a safety one for this age of use.
Does the firm feel change in the super king size?
No, the firm feel is the same across all six sizes. What changes is how the width uses it: over 180cm, a firm pocket-sprung surface keeps each sleeper's side stable, so one person shifting or getting up is less likely to wake the other.