Millbrook Wool Sublime Firm Pocket 8000 King Size 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
£1,394.03
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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
- More room each: At 75cm each for two sharing, you get 7.5cm more than on a UK double, which means a little less brushing against each other through the night.
- Length for taller sleepers: The 200cm length is 10cm longer than a UK double, which means a partner over six foot can lie straight without their feet reaching the end.
- Easier early starts: If one of you leaves hours before the other, the extra width gives the early riser more space to get up without rolling across their partner's side.
- Space without a super king footprint: The UK super king is 30cm wider, so the UK king suits a master bedroom that looked generous until the wardrobes went in.
This size suits you if...
you share the bed every night and a UK double has started to feel crowded, one of you is over six foot and wants the extra 10cm of length, or your bedroom is at least 2.7m x 2.9m, our suggested minimum for a UK king.
Consider another size if...
your bedroom is under 2.7m x 2.9m. We'd recommend the UK double instead, allowing at least 2.6m x 2.8m, or the UK super king if you have room and want 90cm each.
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FAQ's
Is the Millbrook Wool Sublime Firm Pocket 8000 UK king long enough if you're over 6ft?
The UK king is 200cm long, or 6ft 6in, which is 10cm longer than the UK double. For a partner over six foot, that extra length is often the main reason to upgrade, since it gives room to stretch out without feet reaching the end.
How much space do couples get on a UK king Millbrook Wool Sublime Firm Pocket 8000?
Two people sharing get 75cm each. That is 7.5cm more each than on the UK double, though 15cm less each than on the UK super king, which gives 90cm per person.
Millbrook Wool Sublime Firm Pocket 8000: UK king or UK super king?
The UK super king is 30cm wider but the same length, giving 90cm each rather than 75cm. It needs more floor, though: we suggest at least 3m x 2.9m, against 2.7m x 2.9m for the UK king. If your room is tight, the UK king is the more comfortable fit.
Will a Millbrook Wool Sublime Firm Pocket 8000 king size fit a new build master bedroom?
Allow at least 2.7m x 2.9m, with 3.2m x 3.2m giving comfortable space to walk around. New build bedrooms can feel smaller once fitted wardrobes are in, so measure the clear floor that remains rather than relying on the room's listed size.
Is a UK king Millbrook Wool Sublime Firm Pocket 8000 good if one of us gets up much earlier?
The extra width helps, as the early riser has more room to get out without crossing into their partner's space. Millbrook doesn't publish motion transfer details for this mattress, so if movement disturbance is your main concern, ask the retailer before you buy.