Millbrook Smooth Tech Luxury 4000 Pocket Mattress
Mattress
Millbrook Smooth Tech Luxury 4000 Pocket Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
33
Layers
3
Layer Details
- Cover. A knitted cover that is soft to the touch, adding a layer of cosiness and warmth. It's designed to enhance airflow and breathability, which means less heat build-up overnight.
- Comfort fillings. Hampshire wool and English cotton sit beneath the cover, natural fibres that help with temperature regulation. Smooth Tech™ inner-tufting smooths the surface, so you get a gentle sleeping feel without traditional raised tufts.
- Support system. 4000 individual pocket springs, each encased in a cloth pocket made using 200 repurposed plastic bottles per mattress. Nemoflex™ technology provides edge-to-edge support, which means you can use the full width of the bed without a roll-off feeling at the sides.
Layer details from mattressonline.co.uk product page, September 2026.
- A grown-up single: With 4000 pocket springs and natural fillings, this is a proper adult mattress in a one-person footprint, which suits solo sleepers who don't want a budget compromise.
- Fits compact rooms: At 90cm wide, it leaves floor space for a desk or wardrobe; we suggest allowing at least 2.1m x 2.8m of room.
- Edge-to-edge support at 3ft: Nemoflex™ technology supports right to the sides, which matters more in a single where you're never far from the edge.
- Cool for teenagers: Hampshire wool and English cotton help regulate temperature, useful for teens who run warm under a duvet in a small bedroom.
- Guest room quality: Its medium firm tension suits a wide range of visiting sleepers, so a spare room single stays comfortable whoever turns up.
This size suits you if...
You sleep alone and want a supportive, natural-filled mattress rather than an entry-level single, you're upgrading a teenager's bed to something with proper spring support, or you're furnishing a guest room and want a single that adult visitors will find genuinely comfortable. It also suits a student room or first flat where the frame is provided and the mattress is yours to choose.
Consider another size if...
You share a bed, or you're buying for a bunk, cabin or mid sleeper frame, where the 33cm depth may sit above the guard rail. Millbrook lists this mattress in the UK single only, so couples will need a different model.
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What size is the Millbrook Smooth Tech Luxury 4000 UK single?
It measures 90 x 190cm, or 3ft x 6ft 3in, the standard UK single. That's the classic one-person size, and standard single sheets and a single duvet (135 x 200cm) fit it without any hunting for unusual bedding.
Does the Millbrook Smooth Tech Luxury 4000 come in a double?
No. It's currently listed in the UK single only, so it isn't an option for couples. If you're set on this mattress, that means a solo bed; anyone sharing will need to look at a different Millbrook model or another brand entirely.
Will the Millbrook Smooth Tech Luxury 4000 single fit a bunk bed?
The width fits, but the depth is the problem. At 33cm this mattress is likely to sit above the guard rail on most bunk, cabin and mid sleeper frames, which is a safety issue for children. Check your frame's maximum mattress depth before buying; a slimmer single is usually the safer choice.
What room size do I need for a UK single mattress?
We suggest allowing at least 2.1m x 2.8m of floor space. That leaves room to walk around the bed and open drawers or a wardrobe. The single's 90cm width is why it works in box rooms, loft conversions with a narrow footprint, and children's rooms where the bed competes with toys and a desk.
Where can I buy the Millbrook Smooth Tech Luxury 4000 in a UK single?
Compare the retailers listed on this page. The prices shown here are updated as retailers change them, so you're seeing the current picture rather than a snapshot. Availability for this size can shift, which is another reason to check the live table rather than a cached listing elsewhere.