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.
- Real room to spread out alone: At 120cm wide, a solo adult can shift, sprawl and change position freely, with 1000 pocket springs adjusting to wherever you end up.
- Fits rooms a double overwhelms: It's 15cm narrower than a UK double, which can be the difference between a door that clears and one that doesn't in a box room or studio.
- Firm edges matter more at 4ft: The butterfly springs and rod frame border keep the sides supportive, so sleeping near the edge of a narrower mattress doesn't feel precarious.
- Breathable in a compact space: Small rooms warm up quickly, and the Hampshire wool and cotton comfort layer wicks moisture rather than trapping heat the way synthetic foams can.
- Easy to dress: The small double is a standard UK 4ft size, so fitted sheets and frames are straightforward to find.
This size suits you if...
You're a solo adult, or a teenager who has clearly outgrown a single, and you want proper stretching room without giving the bed the whole floor. It also fits a guest room where couples stay occasionally rather than nightly, or a loft or rental second bedroom where a full double would leave no standing room. Allow at least 2.4m x 2.8m of floor space.
Consider another size if...
You share the bed every night. At 120cm wide the medium firm feel supports you well but leaves two adults short on space, so we'd recommend the UK double instead, which is 15cm wider and gives 67.5cm each; allow at least 2.6m x 2.8m.
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Is a small double big enough for one adult every night?
Comfortably. The UK small double gives you 120cm of width to yourself, 30cm more than a UK single at the same 190cm length. On this mattress that means the 1000 pocket springs follow you across a much wider surface, so restless sleepers who like to spread out get genuine benefit from the extra room.
Can a couple share the Millbrook Smooth Tech Luxury 1000 in a small double?
For occasional nights, yes, which makes it a sensible guest room choice. The independent pocket springs limit disturbance when one of you turns over. For every night, though, 120cm is snug for two adults, and the UK double, 15cm wider, gives each sleeper 67.5cm and is a better long-term fit.
What room size do I need for a small double mattress?
We suggest at least 2.4m x 2.8m for a UK small double, which leaves room to walk round the bed and open drawers. That's our guidance rather than Millbrook's. In a loft conversion or box room, the 15cm you save over a UK double often decides whether furniture, or the door, still fits.
Is the small double a good choice for a teenager?
It's a common upgrade once a single feels cramped. A growing teenager gets adult-level space at 120 x 190cm, the medium firm feel offers solid support, and the wool and cotton layer breathes well. It leaves more floor free than a UK double, which matters in a typical child's bedroom.
Where can I buy the Millbrook Smooth Tech Luxury 1000 in a small double?
Stockists for this size are limited, so compare the retailers listed on this page; the prices shown here are updated as retailers change them. If you're set on seeing the mattress in person before buying, that narrow availability makes it harder, which is worth weighing before you commit.