Millbrook Smooth Tech Luxury 1000 Pocket Mattress
Mattress
Millbrook Smooth Tech Luxury 1000 Pocket Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
28
Layers
3
Layer Details
- Comfort Layer. Sustainably sourced Hampshire wool with fine cotton fibres woven through it, sitting directly beneath you. Wool insulates in winter and breathes in summer, which means a more stable temperature through the night.
- Support System. A core of 1000 steel pocket springs, each enclosed in its own fabric pocket. Because every spring compresses independently, the mattress follows your shape rather than tilting as one surface, which also helps limit partner disturbance.
- Border. Sets of butterfly springs shaped to reinforce the mattress edge, held together by a rod frame. In practice that means firmer edges, useful if you sit on the bed to dress or tend to sleep near the side.
Layer details from mattressonline.co.uk product page, September 2026.
- Space enough to move without waking anyone: With 75cm each for two people sharing, one of you can turn over or get up early while the pocket springs keep the disturbance local.
- Extra length for taller sleepers: At 200cm, the UK king is 10cm longer than the UK double, which matters far more than width if one of you is nearing six foot.
- Wool that breathes across a bigger surface: The Hampshire wool and cotton comfort layer wicks moisture and steadies temperature, useful when two bodies share one bed all night.
- Firm edges you can actually use: Butterfly springs and a rod frame reinforce the border, so sleeping near your own edge in a shared king doesn't feel like teetering.
- A substantial build for a bigger bed: The 28cm depth gives the king a solid, traditional feel, with a medium firm tension that suits most couples of average build.
This size suits you if...
You share the bed every night and a double has started to feel like a negotiation, or one of you is close to six foot and keeps finding the footboard. It also suits couples on different schedules, where one person gets up hours before the other: the independent springs and the extra width between you both help the sleeper stay asleep.
Consider another size if...
Your bedroom falls below the 2.7m x 2.9m we suggest for a UK king, or you sleep alone. In either case we'd recommend the UK double instead, which needs a smaller room at around 2.6m x 2.8m.
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.
Is the Millbrook Smooth Tech 1000 in a UK king good for couples?
Yes, and it's arguably the size this design makes most sense in. Two people get 75cm each, and because each of the 1000 springs compresses on its own, a restless partner or an early alarm on one side transfers very little movement to the other. The medium firm tension suits most couples, although lighter side sleepers may find it slightly firm.
How much bigger is a UK king than a double in this mattress?
The UK king is 15cm wider and 10cm longer than the UK double. Put another way, the UK double gives 67.5cm each for two sharing, so the UK king gives 7.5cm more each. That extra length is often the real reason to upgrade: at 200cm, it stops taller sleepers hanging off the end.
What room size do I need for this mattress in a UK king?
We suggest a room of at least 2.7m x 2.9m for a UK king, which leaves enough space to walk round the bed and open drawers. Newer homes can be tighter than they look once wardrobes go in, so measure the floor with furniture in place before committing. If it's a squeeze, we suggest at least 2.6m x 2.8m for the UK double.
Is the UK king long enough for someone over six foot?
At 200cm (6ft 6in), it gives most tall sleepers comfortable clearance, and it's 10cm longer than the UK double. The firmer border from the butterfly springs and rod frame also helps here, since taller people tend to use the full surface right to the edges. Only the UK super king matches it for length in this range.
Where can I buy the Millbrook Smooth Tech 1000 in a UK king?
Availability for this mattress is limited, so compare the retailers listed on this page; the prices shown here are updated as retailers change them. Because you're unlikely to try it in a showroom, check the medium firm description against your own preference carefully, particularly if you're a lighter side sleeper.