Available 
Millbrook Smooth Tech Luxury 1000 Pocket Mattress
from £529-£1,487.
£529-£1,487
Sizes tracked: Single, Small Double, Double, King Size, Super King
Millbrook Beds Pocket Sprung
Millbrook Wool Luxury 4000 Pocket Mattress review
Millbrook Wool Luxury 4000 Pocket Mattress is a medium-to-firm pocket sprung option with wool-and-cotton comfort, 5 size choices and a price range from £555 to £1,129.
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Last verified: 2026-08-29
Quick verdict
Millbrook Wool Luxury 4000 Pocket Mattress looks most relevant to shoppers who want a medium-to-firm pocket sprung mattress with a natural-feel wool-and-cotton comfort layer rather than a foam-heavy build. With 5 sizes and a tracked price range of £555-£1,129, it sits in a practical middle ground rather than as a budget outlier or a clearly premium-only pick. The 100-night comfort trial and 10-year warranty add reassurance, but you should still compare the live size price, stock and frame fit before buying.
Available sizes and prices
Millbrook Wool Luxury 4000 Pocket Mattress is listed with 5 size options from £504-£1,024. The visible sizes include Single, Small Double, Double, King Size, so use the table to compare the option that matches the exact size, colour, format or specification you want. Always confirm the final checkout price, delivery charge and stock status on the retailer page.
| Size | Firmness | Price | Stock | Last checked | Link |
|---|---|---|---|---|---|
| Single | Check retailer | £504 | In stock | 2026-08-29 | View |
| Small Double | Check retailer | £638 | In stock | 2026-08-29 | View |
| Double | Check retailer | £638 | In stock | 2026-08-29 | View |
| King Size | Check retailer | £754 | In stock | 2026-08-29 | View |
| Super King | Check retailer | £1,024 | In stock | 2026-08-29 | View |
Key product details
These are the retailer details worth checking first for Millbrook Wool Luxury 4000 Pocket Mattress: Brand: Millbrook Beds; Type: Pocket Sprung; Sizes tracked: Single, Small Double, Double, King Size, Super King; Price range: £504-£1,024. Treat them as a quick fact sheet, then use the retailer page to verify any installation, warranty, delivery or model-number details before buying.
| Brand | Millbrook Beds |
|---|---|
| Type | Pocket Sprung |
| Sizes tracked | Single, Small Double, Double, King Size, Super King |
| Price range | £504-£1,024 |
| Owner rating signal | 4.7 out of 5 shown; review volume needs checking with the retailer |
| Last checked | 2026-08-29 |
What the retailer listing says
Mattress Online lists the Millbrook Wool Luxury 4000 Pocket Mattress as a pocket sprung model with 4000 pocket springs, medium to firm firmness, wool and cotton fillings, edge support, air vents, turning handles and double-sided construction. The page also shows a 100-night comfort trial and a 10-year warranty, which are useful shopper checks if you want extra reassurance before checkout. The listed depth is 28cm across the tracked sizes, so it is worth confirming compatibility with your bed frame, fitted sheets and any topper you plan to use.
What wider research adds
The clearest takeaways are that this product sits close to the comparable-product median price of £599, so it is neither unusually cheap nor expensive for a pocket sprung mattress with this kind of spec. It also has 5 tracked variants, which is a little broader than the median of 4, so size choice is a genuine part of the value picture here. Review evidence is encouraging but should be treated carefully: the visible 4.7 out of 5 rating is positive, yet the review count needs checking before it is treated as a strong decision-maker, so this works better as a shortlist option than a definitive ranking.
Buyer trade-offs to weigh up
The main trade-off is between the natural-fill pocket sprung feel and what you prefer from your mattress surface. If you like a steadier, medium-to-firm feel, the 4000 pocket springs and wool-and-cotton layers may suit better than a foam-led alternative; if you prefer a softer or more sink-in finish, it may feel too structured. The 28cm depth is another practical check because it can affect bed-frame clearance, sheet fit and the way the mattress sits on your base, while the size spread means price changes should be compared carefully rather than assumed to be similar across the range.
Price and value benchmark
At £555 to £1,129, the Millbrook Wool Luxury 4000 Pocket Mattress sits in the middle of the tracked pocket sprung set rather than at either extreme. The single starts at £555, while the king size is listed at £939 and the super king at £1,129, so size choice has a major effect on value. Compare those figures against nearby pocket sprung alternatives and check the live checkout price, because sale periods and stock changes can shift the final amount you pay.
Specs versus nearby alternatives
Against nearby pocket sprung alternatives, the 4000 spring count is a useful clue to its positioning, but it should not be treated as a simple quality score. Models such as the Millbrook Wool Luxury 1500 Pocket Pillow Top Mattress or Sleepeezee Wool Luxe 1200 Pocket Mattress may offer a different feel, price spread or layer mix, while the Millbrook Smooth Tech Luxury 1000 Pocket Mattress gives another Millbrook comparison point across the same size range. If you are choosing between fewer or more springs, look at the overall construction, firmness and price by size rather than spring count alone.
How to read the review evidence
The visible 4.7 out of 5 owner rating is a helpful trust cue, but it should not replace product-specific comparison or independent review context. The review count should be checked on the retailer page, because a high average with little volume is less informative than a strong rating backed by many owners. Treat it as one part of the decision alongside the 100-night comfort trial, 10-year warranty and the practical fit of a 28cm double-sided mattress.
Who it suits
This mattress should suit shoppers who want a steadier surface, medium-to-firm support and a natural-feel pocket sprung build with wool and cotton comfort layers. In sleep-position terms, that usually makes it a better fit for back and some side sleepers who like a firmer, more structured feel rather than deep sink. It is also a sensible fit if you want size flexibility, because the tracked options run from Single at £555 through to Super King at £1,129, making it easier to match a guest room, main bed or larger shared space. If you value a more traditional mattress feel with turning handles, edge support and a turnable construction, this is a clear shortlist candidate.
Who should avoid it
You may want to look elsewhere if you prefer a noticeably softer feel, want foam-led comfort, or need a clearly different construction for a lower budget. If the Millbrook Wool Luxury 4000 Pocket Mattress in King Size at £939 or Super King at £1,129 is outside your target spend, a simpler build may suit better. Shoppers who dislike turnable mattresses or do not want to factor in a 28cm depth may also prefer a different format. If you are mainly comparing by price, a nearby alternative with fewer springs or a simpler build may be a better fit than paying for the wool-and-cotton construction here.
Comfort and support
The support system is pocket springs, with the retailer listing 4000 of them, so the mattress is aimed at a more refined sprung feel rather than an all-foam response. The wool and cotton comfort fillings point to a natural-feel surface that should feel different from memory foam or hybrid foam-heavy mattresses, but that is a construction cue rather than a guarantee of how it will feel to you. Because the listing also mentions double-sided use and turning handles, shoppers should be ready for a mattress that is designed to be maintained rather than treated as a no-turn option.
Value check
Value here depends on whether you want the specific combination of 4000 pocket springs, wool-and-cotton comfort, 5 sizes, a 100-night comfort trial and a 10-year warranty. If those features match your priorities, the price range looks reasonable for a mid-range pocket sprung mattress; if they do not, the same budget may buy a better-fitting alternative with a different feel or construction. Before deciding, confirm the live price and stock for your chosen size, because the retailer’s current checkout details are the most important value signal.
Good alternatives to compare
The closest alternatives to compare with Millbrook Wool Luxury 4000 Pocket Mattress include Millbrook Smooth Tech Luxury 1000 Pocket Mattress, Millbrook Wool Luxury Latex 4000 Pocket Mattress, Millbrook Wool Luxury 5000 Pocket Mattress. Use these cards to check whether a nearby model gives you a better price, a more suitable specification or a clearer match for your space and budget.
Available 
Millbrook Wool Luxury Latex 4000 Pocket Mattress
from £594-£1,168.
£594-£1,168
Sizes tracked: Single, Small Double, Double, King Size, Super King
Available 
Millbrook Wool Luxury 5000 Pocket Mattress
from £488-£964.
£488-£964
Sizes tracked: Single, Small Double, Double, King Size, Super King
Retailer details used
Last checked 2026-08-29. The source list below is included to help you check the details behind the comparison. Always confirm the latest price, delivery cost, stock status and product details with the retailer before buying.
More mattresses to compare
These related guides and reviews can help you compare nearby options before buying.
Questions about this mattress
Is the Millbrook Wool Luxury 4000 Pocket Mattress worth shortlisting at its current price?
Yes, if you want a medium-to-firm pocket sprung mattress with wool and cotton fillings and a natural-feel construction. At £555-£1,129 across 5 sizes, it looks like a mid-range shortlist option rather than a bargain-bin buy. Check the live price, stock and size before deciding.
Does the price vary by size, and which size looks best value?
Yes, the price changes by size, with the single at £555, the double at £759, the king size at £939 and the super king at £1,129. Best value depends on your room size and budget, so compare the exact size you need rather than judging the model on one headline price.
How much weight should shoppers give the 4.7 retailer rating?
Treat the 4.7 out of 5 as a useful shopper cue, not proof that this is the right mattress for you. The review count should be checked, because rating averages are less meaningful when volume is unclear. Use it alongside the 100-night comfort trial, warranty and construction details.
What should I check before buying?
Confirm the live price and stock for your chosen size, whether the 100-night comfort trial and 10-year warranty are still current, and whether the 28cm depth suits your bed frame and bedding. It is also worth checking whether you prefer this wool-and-pocket-sprung feel over a foam-led alternative.