Firmness
Firm
Type
Pocket Spring
Depth (cm)
24
Number of Layers
3
Trial Period (nights)
100
Warranty (years)
10
Price Range
£375 to £709
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 draw here is genuine firm support built from natural materials. The 1000 pocket springs are hand-nested and individually encased in cloth pockets, which means each one responds to your body separately rather than the whole surface moving as one. Above them, 100% Hampshire fleece wool and English cotton wick moisture and regulate temperature, useful if you tend to sleep warm. It's approved by the National Bed Federation and double-sided, so you can flip it to even out wear, something many modern mattresses no longer allow. Yes, firm won't suit everyone, but for back sleepers and heavier builds who find softer mattresses let them sink too far, that firmness is precisely the point.
Key Features & what's inside
- Comfort Layer. A layer of 100% Hampshire fleece wool, locally sourced from Hampshire. Wool is naturally breathable and temperature-regulating, so it helps keep you comfortable through the seasons.
- Comfort Layer. Natural English cotton fibres that regulate body temperature and wick away moisture. This means less of that clammy feeling on warmer nights.
- Support System. 1000 individually hand-nested pocket springs, each encased in its own cloth pocket. Because every spring moves independently, you get tailor-made support and less disturbance from a partner shifting position.
Layer details from mattressonline.co.uk product page, September 2026.
Who's it NOT for?
This is a genuinely firm mattress, so lightweight side sleepers are likely to find it too hard on the shoulders and hips. If you prefer a cushioned, sink-in feel or the contouring of memory foam, look elsewhere. Being double-sided, it also needs turning regularly, which some people would rather avoid.
Millbrook Wool Ortho 1000 Pocket Mattress
Across 526 verified reviews on the Mattress Online product page, this mattress holds a 4.6 rating, with customers commonly reporting deeply comfortable, supportive sleep and reduced back pain. Owners describe it as firm and well-made, and frequently recommend it to anyone with back discomfort who needs firm support.
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How firm is the Millbrook Wool Ortho 1000 Pocket mattress?
It's rated firm, and owner reviews back that up, describing it as properly firm rather than medium-firm in disguise. That suits back sleepers and heavier builds well, although lightweight side sleepers may find it a little too solid for comfortable pressure relief.
Does the Millbrook Wool Ortho 1000 come with a trial?
Mattress Online, the retailer listing this mattress, offers a 100-night trial. That's the retailer's own policy rather than a Millbrook guarantee, so if you buy elsewhere, check that seller's terms before ordering.
Is the Millbrook Wool Ortho 1000 mattress double-sided?
Yes, it's double-sided with turning handles, so you can flip it to even out wear and extend its life. That's increasingly rare, as most modern mattresses are one-sided, but it does mean a bit of regular effort on your part.
What sizes does the Millbrook Wool Ortho 1000 come in?
Six UK sizes: small single, single, small double, double, king and super king. Prices run from £375 to £709 depending on the size you choose.
How long is the guarantee on the Millbrook Wool Ortho 1000?
The Mattress Online listing states a 10-year guarantee, which gives you long-term reassurance on a mattress at this price. As with any guarantee, keep your proof of purchase and follow the care instructions, including regular turning.
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