What our reviewers found
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Finding the perfect mattress comes down to a lot of factors; from size, softness, and support, to the intricacy of its inner construction. With so many options, it can feel like a daunting task, so allow me to introduce - the Millbrook Smooth Tech Ultra 10000 Pocket Mattress. This mattress carefully stitches together luxury, comfort and structural integrity, promising a night's sleep that is as restful as it is invigorating.
How we assessed it
The support comes from 2,000 full-size pocket springs. The 8,000 mini springs are listed with the comfort fillings, next to the wool, silk, cashgora and cotton, and I'd expect that mix to give a soft, springy top that lets a side sleeper's hip and shoulder sink in, as the soft to medium rating suggests. Natural fillings and the air vents in the border should keep it cooler than anything topped with foam. A sprung top like this should also be easy to turn over on, which is what I'd want for a restless sleeper. One owner who "struggled to find one on the soft side" was "really glad we found this one". It's 35cm deep and double-sided, so flipping it is a two-person job. Use the turning handles.
Design and features
The Millbrook Smooth Tech Ultra 10000 Pocket Mattress is a perfect example of combining detailed design features with uncompromising quality. With a staggering 10,000 pocket springs (comprising 2,000 full size and 8,000 mini springs), each encased in individual fabric pockets, the mattress provides a tailored and individualised sleeping experience.
It features a sumptuous comfort layer of natural fibres including wool, silk, cashgora and cotton that come together to create a relaxing sleep environment. Along with this luxurious feel, it employs a soft to medium tension, ideal for side sleepers, with excellent edge support, butterfly springs and a frame rod to guard against the notorious 'roll-off' feeling. To keep things fresh, the mattress is double-sided and includes turning handles for easy seasonal flipping.
Mattress comfort
Using the unique properties of individual pocket springs, natural fibre content and a well-constructed layer of mini springs, this mattress achieves a great balance of plushness and support. The medium firmness offers a nurtured sink-in feel while delivering targeted support to pressure points which eases muscle and joint tension for an utterly restful slumber.
Suitability
While this mattress possesses many great features, it isn't a one-size-fits-all solution. It is indeed a superb choice for side sleepers, those of lower BMI or with hourglass figures who require extra cushioning from the support layer. However, back sleepers and individuals in need of orthopaedic support may find it less than ideal. Despite the impressive spring count being more marketing ploy than functional, the mattress scores high in terms of overall quality.
What customers thought
As a mattress reviewer, I examine the product from a technologically informed perspective. However, the value of a mattress lies in the comfort and satisfaction it offers its users. Customer reviews form an integral part of our review process. Owners say it's on the soft side and still supportive. One "wanted one on the soft side of medium firm and it is just that while being supportive as well". Another wrote "For a mattress that is on the softer side it's very supportive", with "no aches or pains". They call it "Well worth the money" and "A worthwhile upgrade". It's heavy, though: one owner's delivery men were "really good with very heavy mattress".
The verdict
For those on the hunt for a soft to medium firm mattress with excellent edge support, a generous comfort layer, a long warranty period, and a durable, high spring count for personalised support, the Millbrook Smooth Tech Ultra 10000 Pocket Mattress should make your shortlist. However, back sleepers and those needing orthopaedic support may find it lacking. On the whole, this mattress combines clever design with quality components, and as such, the Millbrook Smooth Tech Ultra 10000 Pocket Mattress earns a high commendation in our books.
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Published: 2 February 2025 · Updated: 24 April 2026