Millbrook Duke Natural Silk Mattress
Mattress
Millbrook Duke Natural Silk Mattress
Size
Firmness
Construction
Depth (cm)
28
Layers
5
Layer Details
- Sleep Surface. A Belgian damask viscose cover that feels silky rather than scratchy against bedding. It's highly breathable, which means moisture escapes rather than lingering, helping the bed feel fresher night after night.
- Natural Silk Layer. Silk is lightweight and exceptionally soft, which means a gentle, cushioned first impression when you lie down. It's a genuine luxury filling rather than a marketing flourish.
- Sustainably Sourced Hampshire Wool. Wool is naturally elastic and durable, which means the cushioning recovers its shape rather than flattening quickly. It also regulates temperature well, a quiet advantage if you run warm.
- Fine English Cotton. Premium English-spun cotton, crafted in the North West of England, adds a soft, breathable comfort layer. Cotton wicks moisture, which means a drier, more comfortable sleeping surface.
- Support System. A 7-zone ergonomic pocket spring system with up to 1000 individually responsive springs in a king size, designed to mirror the body's natural contours. Softer cushioning at the shoulders and firmer support through the hips means better spinal alignment, particularly for side sleepers.
Layer details from mattressnextday.co.uk product page, September 2026.
- A shared size that fits real rooms: At 135 x 190cm, the UK double leaves space for wardrobes and drawers where a UK king would dominate, so most couples' bedrooms take it comfortably.
- Motion isolation matters more at this width: With 67.5cm each for two people sharing, the individually responsive pocket springs help stop a restless partner's movement travelling across the bed.
- Natural fillings for two warm bodies: Silk, Hampshire wool and English cotton breathe better than synthetic foam, which means less trapped heat when a couple shares this closer footprint.
- Bedside tables on both sides: Allow at least 2.6m x 2.8m and most rooms will still fit a table each side, something a UK king often rules out.
- Easy to dress, easy to budget for: Double sheets and a 200 x 200cm duvet are stocked everywhere at every price, useful if you're kitting out a whole home at once.
This size suits you if...
You share the bed every night and your room sits comfortably above our suggested 2.6m x 2.8m minimum, or you sleep alone and want proper space to stretch out, perhaps with a dog or cat claiming a corner. It also works well in a guest room that hosts visiting couples, where the natural fillings give guests a genuinely comfortable night without the bed taking over the room.
Consider another size if...
You and your partner both like space, or one of you is broad-shouldered, since 67.5cm each can feel snug. We'd recommend the UK king instead: it gives 75cm each for two sharing, and we suggest a room of at least 2.7m x 2.9m for it.
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Is the Millbrook Duke Natural Silk in a UK double big enough for a couple?
For most couples, yes. The UK double gives 67.5cm each for two people sharing, and the pocket springs move independently, so one person turning over is less likely to disturb the other. That said, the UK king gives 75cm each, so if either of you is a sprawler, sizing up is the safer call.
What room size do I need for the Millbrook Duke in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That's our guidance, not Millbrook's, and it assumes you want to walk round the bed and open drawers without shuffling sideways. If your room is smaller, the UK small double is 15cm narrower and needs at least 2.4m x 2.8m.
Should I buy the Millbrook Duke in a UK double or a UK king?
It usually comes down to your room. The UK double is 15cm narrower and 10cm shorter than the UK king, so it suits rooms where a king would crowd the furniture. Choose the UK king if you have at least 2.7m x 2.9m and want the extra 7.5cm each; otherwise the UK double is the practical pick.
How big is the Millbrook Duke Natural Silk in a UK double?
It measures 135 x 190cm, which is 4ft 6in x 6ft 3in. That's the standard UK double footprint, so any double bed frame, double fitted sheets and a 200 x 200cm double duvet will fit it. The 28cm depth is the same across every size, so use deep fitted sheets.
Will a UK double mattress get up narrow stairs?
A pocket sprung mattress like the Millbrook Duke can't be rolled or folded the way boxed foam can, so the full 135 x 190cm has to turn every corner on the way up. Measure tight landings and stairwell turns before ordering, particularly in older terraces, and check the retailer's delivery access advice via the listings on this page.