Millbrook Smooth Tech 5000 Pillowtop King Size Mattress
The Millbrook Smooth Tech 5000 Pillowtop Mattress combines a pillow top with a wool, cotton, silk and cashgora comfort layer, which means you get a cushioned, medium-soft feel over a pocket spring core.
- Medium-soft feel for side sleepers
- Pillow top adds extra cushioning
- Wool, cotton & silk comfort layer
£1,634
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Millbrook Smooth Tech 5000 Pillowtop Mattress
More available sizes
Mattress details
Mattress
Millbrook Smooth Tech 5000 Pillowtop Mattress
Size
Firmness
Medium Soft
Construction
Pocket Spring
Wool
Depth (cm)
32
Layers
3
Layer Details
Pillow top
An additional layer of comfort sitting at the very top of the mattress. It adds extra cushioning, which means a softer first feel as you lie down.
Comfort layer
A fine blend of wool, cotton, silk and cashgora. These natural fibres give the surface its soft, cushioned feel.
Support core
Durable ergonomic pocket springs together with Comfonomic micro springs. This is the part that holds you up beneath the softer layers above.
Layer details from mattressonline.co.uk product page, October 2026.
Key benefits
- More room each than a double: You get 7.5cm more each than on a UK double, which means a little more distance between you when one of you turns over at 3am.
- Length for taller sleepers: At 200cm long, the UK king adds 10cm over a UK double, so a taller partner's feet are less likely to hang off the end.
- Steadier edges across a wider bed: The triple secured border reinforces the sides, which helps if one partner sleeps near the edge to give the other more room.
- Soft surface for side sleepers: The medium soft pillow top cushions shoulders and hips, which suits a couple where one or both of you sleep mostly on your side.
- Space without super king demands: The UK king gives couples extra room while needing less floor space than the UK super king, which we suggest needs at least 3m x 2.9m.
This size suits you if...
You share the bed every night and have started to feel crowded on a double, especially if one of you gets up hours earlier than the other. It also suits you if one partner is tall enough that a 190cm bed feels short, and you both prefer a soft, cushioned surface to a firm one.
Consider another size if...
Your bedroom is smaller than our suggested minimum of 2.7m x 2.9m for this size. We'd recommend the UK double instead, which we suggest needs at least 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.
FAQ's
Is the Millbrook Smooth Tech 5000 Pillowtop UK king big enough for two people?
For most couples, yes. The UK king gives you 75cm each, which is 7.5cm more each than the UK double. That extra space helps if one of you leaves for work early or tosses and turns, although couples who still feel cramped may want more width.
What size bedroom do I need for a Millbrook Smooth Tech 5000 Pillowtop king size?
We suggest allowing at least 2.7m x 2.9m for a UK king, with 3.2m x 3.2m feeling comfortable. New build master bedrooms can feel smaller once wardrobes are fitted, so measure the clear floor space rather than the room on the plans.
Should I get the UK king or UK super king Millbrook Smooth Tech 5000 Pillowtop?
Both are 200cm long, so the difference is width. The UK super king gives 90cm each for two sharing, which is 15cm more each than the UK king. If your room fits at least 3m x 2.9m and a dog shares the bed, the UK super king may suit you better.
Is a UK king long enough for a tall partner?
The UK king is 200cm long, 10cm longer than the UK double, which makes a real difference for anyone approaching 6ft. If length is your main reason for upgrading, it's worth knowing the UK super king is no longer than the UK king, only wider.
What bedding fits the Millbrook Smooth Tech 5000 Pillowtop in a UK king?
King size sheets and a 230 x 220cm king duvet fit the UK king. The mattress is 32cm deep, so check that your fitted sheet has deep enough pockets to tuck securely under the pillow top.