Silentnight Rest Assured Milldale 3000 Pocket Wool Mattress - Firmer
The Milldale 3000 is a pocket spring mattress from Silentnight's Rest Assured range, built around 2000 zoned pocket springs plus 1000 mini springs, which means support that adjusts to different parts of your body rather than pushing back evenly everywhere.
- Natural fibres keep you cooler
- Firm, zoned support at the hips
- 60-night trial & 5-year guarantee
£680
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The Milldale 3000's natural fillings do the comfort work: British wool, silk, cashmere and alpaca sit in the upper layers, so it breathes well and should suit hot sleepers. This is the Firmer version, with a softer option also available. At 32.5cm deep with a tufted pillowtop, it feels substantial. It costs real money, although the natural fillings and 3000-spring build go some way to justifying it.
Mattress specifications
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)
Back Sleeping
Stomach Sleeping
Certifications
Allergy UK
Assessed from Silentnight's published specification for this mattress, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
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 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 & layer details
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.
Layer details from silentnight.co.uk product page, September 2026.
Best suited for?
Warm sleepers
Wool, silk, cashmere and alpaca in the upper layers breathe and wick moisture, which means you are less likely to overheat than on an all-foam design.
Allergy sufferers
The mattress is Allergy UK approved, which offers reassurance if dust mites or allergens trouble your sleep, and it is naturally flame retardant without added chemical treatments.
Back sleepers
Zoned pocket springs give firmer support around the hips, while the firm feel keeps your spine supported and the tufted pillowtop adds a little cushioning.
Heavier sleepers
A 3000-spring build with 2000 zoned pocket springs and 1000 mini springs gives firm, responsive support where your body weight sits heaviest.
Couples
Tufting holds the natural fillings in place, so the surface is less likely to shift or settle unevenly, and the 60-night trial lets you both decide.
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, given the starting price, or if you'd rather avoid animal-derived materials like wool and silk.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Silentnight Rest Assured Milldale 3000 Pocket Wool Mattress - Firmer
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FAQ's
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. The mattress is 32.5cm deep across the range, so check your fitted sheets will accommodate that depth.
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