Millbrook Baroness Natural Wool Mattress
Mattress
Millbrook Baroness Natural Wool Mattress
Size
Firmness
Depth (cm)
25
Layers
4
Layer Details
- Sleep Surface. A Belgian damask viscose cover that feels silky and soft to the touch. It's highly breathable, which means a fresher sleeping environment through the night.
- Comfort Fillings. Sustainably sourced Hampshire wool sits beneath the cover, giving a cosy, cushioning feel. Wool is known for its durability and elasticity, so this layer should keep its shape well.
- Comfort Fillings. A layer of fine English cotton, spun and crafted in the North West of England. Cotton adds softness and helps the mattress breathe.
- Support System. 7-zone ergonomic pocket springs, up to 1000 individually responsive springs in a king size, with the count varying by size. The zoning gives softer comfort at the shoulders and firmer support at the hips and back, which means better spinal alignment for most sleepers.
Layer details from mattressnextday.co.uk product page, September 2026.
- 90cm of width each: Two sharing get 90cm each, so a partner who turns over frequently is far enough away that you barely register it.
- Wool breathability across a big surface: The Hampshire wool filling helps regulate temperature, useful when a larger shared surface holds more body heat overnight.
- Room for night-time visitors: If children or a large dog regularly end up in your bed, 180cm of width means everyone still gets a workable share.
- Zoned support for two different sleepers: The 7-zone pocket springs give softer comfort at the shoulders and firmer support at the hips, so each side of the bed gets support suited to that sleeper.
- Natural fillings at scale without a steep price: The Baroness sits at the accessible end of natural mattresses, which matters at super king size where costs usually climb quickly.
This size suits you if...
You share every night and want distance from a restless partner rather than another comfort layer, you have young children or pets who join you and need the bed to absorb the extra bodies, or you have a large master bedroom, perhaps in a period property, where a UK king would look and feel undersized against the space.
Consider another size if...
Your bedroom is under our suggested 3m x 2.9m minimum, or you don't need the extra width for visitors or a restless partner. The UK king would suit you better: it's the same 200cm length, still giving a generous 75cm each.
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Is the Millbrook Baroness super king big enough for a couple with kids climbing in?
It copes better than any smaller standard size. At 180cm wide, two adults sharing get 90cm each, so when a child wanders in at 3am there's still a reasonable share of mattress for everyone. The wool and cotton fillings breathe well too, which helps when extra bodies raise the temperature under the duvet.
How much more room does the super king give than the king size Baroness?
The UK super king is 30cm wider than the UK king, and both are 200cm long. For two people sharing, the UK king gives 75cm each while the UK super king gives 90cm each, so 15cm more per person. That extra width is mostly about undisturbed sleep rather than stretching out.
What room size do I need for the Baroness in a UK super king?
We suggest a minimum of 3m x 2.9m, and that's a genuine minimum: you'll want to check door swing and walkway space around the frame too. If your room falls short, the UK king needs at least 2.7m x 2.9m and gives up nothing in length.
Will the natural wool feel different in a bigger size?
The fillings and medium firm feel are the same across sizes, but the pocket spring count varies by size, with up to 1000 in a king, so the super king carries the 7-zone support across its full 180cm width. Each sleeper gets the zoned shoulder and hip support independently, without rolling towards the middle.
Where can I buy the Baroness super king at the best price?
Retailer stock and pricing change often at this size, so rather than quoting a figure that goes stale, compare the retailers listed on this page. The prices shown here are updated as retailers change them, which makes it easy to see the current cheapest option for the UK super king specifically.