Firmness
Soft
Type
Pocket Spring
Depth (cm)
32
Number of Layers
4
Trial Period (nights)
100
Warranty (years)
10
Price Range
£619 to £1,475
Best Sleeping Position(s)
Certifications
Assessed from the specification published by Mattress Online, captured September 2026, and from regular price comparison across our UK retail partners.
The main appeal here is the filling list. Hampshire fleece wool, silk and cashgora are breathable natural fibres, which means the mattress should handle temperature swings better than synthetic foams. If you're a hot sleeper, that matters. The support system uses ErgoZone 7 zoning: firmer spring tension under your head, hips and feet, with softer zones around your shoulders and legs, so side sleepers get some give where they need it. A metal rod edge secured with butterfly clips adds stability at the border, useful if you sit on the edge to get dressed. It's a soft to medium feel overall, so it leans towards sleepers who want comfort layers they can sink into slightly.
Key Features & what's inside
- Cover. A soft-touch cotton-viscose cover with embroidered detailing, which means the surface feels smooth rather than scratchy. It's treated with M-Pure, a plant-based fire-resistant finish, so fire safety is handled without chemical-heavy treatments.
- Comfort fillings. Blended layers of 100% Hampshire fleece wool, silk and cashgora fibres with English cotton sit beneath the cover. Hand-tufting holds these fillings in place, which means they're less likely to shift or bunch over time.
- Support system. A 5000 pocket spring system with ErgoZone 7 zoning uses thicker gauge wire and higher tension under your head, hips and feet, with softer zones at the shoulders and legs. In practice that means firmer support where your body is heaviest and more give where you need pressure relief.
- Edge support. A metal rod runs along the top and bottom of the spring unit's edge, held with butterfly clips. This stiffens the border, so you get less of that roll-off feeling near the sides and better long-term durability.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
If you prefer a properly firm mattress, this soft to medium feel probably isn't for you, and some owner reviews suggest firmness perception varies. It's also a heavy, hand-tufted natural mattress, so if you'd struggle to rotate a substantial mattress on your own, or share the job with no one, think twice.
Millbrook Wool Luxury 5000 Pocket Mattress
Across 103 reviews on mattressonline.co.uk, averaging 4.7 out of 5, owners praise the comfort, material quality and reduced back pain, though several describe the feel as medium to firm rather than soft, settling over time. A temporary wool-like scent on unpacking and the considerable weight when turning are the recurring gripes.
View all mattresses
How firm is the Millbrook Wool Luxury 5000 mattress?
The product listing describes it as soft to medium. That said, across owner reviews on mattressonline.co.uk, some customers found it firmer than expected initially, with the feel settling over time, so if you're expecting a very plush surface, be prepared for a slightly firmer break-in period.
Does the Millbrook Wool Luxury 5000 come with a trial?
Mattress Online lists a 100-night trial with this mattress. That trial is the retailer's own offer rather than a manufacturer promise, so if you buy elsewhere, check that seller's returns terms before ordering.
What is the Millbrook Wool Luxury 5000 made of?
The comfort layers blend 100% Hampshire fleece wool, silk and cashgora fibres with English cotton, all held in place by hand-tufting. Beneath that sits a 5000 pocket spring system with seven-zone support, and the whole mattress is 32cm deep with a cotton-viscose cover.
How long is the guarantee on the Millbrook Wool Luxury 5000?
The mattressonline.co.uk listing states a 10-year guarantee. As this appears on a retailer's page rather than Millbrook's own site, it's sensible to confirm guarantee terms with whichever retailer you buy from.
Is the Millbrook Wool Luxury 5000 good for hot sleepers?
It should be a decent fit. Wool, silk and cotton are naturally breathable fibres that help regulate temperature, and there are no dense foam layers listed in the construction to trap heat. Owner reviews on mattressonline.co.uk don't flag overheating as a common complaint.
Couldn't find an answer to your question? Send us a message