Firmness
Firm
Type
Pocket Spring
Depth (cm)
33
Number of Layers
4
Trial Period (nights)
60
Warranty (years)
5
Price Range
£680 to £1,260
Best Sleeping Position(s)
Certifications
Assessed from Silentnight's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
The strongest reason to pick the Milldale 3000 is the combination of zoned support and natural materials. Wool, silk, cashmere and alpaca are naturally breathable and wick moisture, which means you're less likely to overheat than on an all-foam design. It's Allergy UK approved, a genuine reassurance if dust mites or allergens trouble your sleep, and it's naturally flame retardant without additional chemical treatments. Silentnight backs it with a 60-night trial and a 5-year guarantee, with delivery in 14 days. Yes, the starting price of £680 is a step up from entry-level pocket sprung mattresses, but you're paying for fillings that cheaper models simply don't include.
Key Features & what's inside
- Pillowtop. A tufted pillowtop filled with layers of British wool sits on top, which means a slightly cushioned surface even on this firmer version. Tufting holds the fillings in place so they're less likely to shift or settle unevenly over time.
- Silk, wool, cashmere and alpaca layer. Beneath the pillowtop is a blend of silk, wool, cashmere and alpaca. These natural fibres breathe and wick moisture, so the mattress stays comfortable and temperature-neutral through the night.
- Sustainable fresh fibres. British wool is layered here with sustainable fresh fibres. This adds depth to the comfort layers while keeping the fillings natural rather than synthetic.
- Pocket spring system. The base holds 2000 zoned pocket springs with an additional 1000 mini springs. Zoning means firmer support where your body is heaviest, typically around the hips, while the mini springs add a finer layer of responsiveness closer to the surface.
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Layer details from silentnight.co.uk product page, September 2026.
Who's it NOT for?
This is the Firmer version, so if you're a lightweight side sleeper you may find it presses a little too hard on your shoulders and hips; the softer option would be a better fit. It's also a poor match if you're shopping on a tight budget, as prices start at £680, or if you'd rather avoid animal-derived materials like wool and silk.
Silentnight Rest Assured Milldale 3000 Pocket Wool Mattress - Firmer
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How firm is the Silentnight Milldale 3000?
Silentnight makes the Milldale 3000 in softer and firmer options, and this is the Firmer version. Firmer mattresses generally suit back and front sleepers, and heavier builds, better than lightweight side sleepers. The tufted wool pillowtop softens the surface a little without changing the underlying support.
How many springs does the Milldale 3000 have?
It contains 3000 springs in total: 2000 zoned pocket springs and an additional 1000 mini springs. The zoning gives different levels of support along the length of your body, while the mini springs sit above to add a more responsive feel near the surface.
Does the Milldale 3000 come with a trial and guarantee?
Yes. Silentnight offers a 60-night trial, so you can sleep on it at home before committing, along with a 5-year guarantee covering manufacturing faults. Delivery is quoted at 14 days.
Is the Milldale 3000 good for allergies?
It's Allergy UK approved, which is a meaningful endorsement if you suffer from dust mite or allergen-related sleep problems. It's also naturally flame retardant without additional chemical treatments, a point in its favour if you'd rather avoid chemically treated fabrics.
What sizes does the Milldale 3000 come in?
It's available in UK Single, Double, King and Super King. Prices range from £680 to £1,260 depending on the size you choose, and the mattress is 32.5cm deep across the range, so check your fitted sheets will accommodate that depth.
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