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Harrison Spinks Knaresborough 3750 Pocket Ortho Mattress
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Harrison Spinks Knaresborough 3750 Pocket Ortho Mattress

In shortBack sleepers who like a firm bed get handcrafted pocket springs, delivered rolled in a box. If you're a lighter side sleeper, I'd spend this money elsewhere. Read the review

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Who is it best for? powered by SnoozeScore

In our experience, the materials and construction that go into this product can make it suitable for the following people.

Back sleeping and stomach sleeper icon
For back and stomach sleepers
Additional support helps these positions
Reduced partner disturbance icon
Reduced partner disturbance
Pocket springs work independently to one another.

What our reviewers found

Pros

Premium manufacturer who know are well regarded in the industry.

Amazing pocket spring system that works well under increased pressure.

Guarantee that will last.

Handcrafted by expert craftspeople.

Cons

Price point may exclude many due to premium nature of the product.

You've spent a third of your life in bed. It's time to make a change. On paper the Harrison Spinks Knaresborough 3250 Pocket Ortho Mattress (now sold as the Knaresborough 3750) is a serious, firm mattress, and owners who wanted that got it: one was after something 'firm yet not rock solid', and another who had always bought firm mattresses called it 'a good supportive orthopaedic but with a softer topper'. With its firm mattress tension, orthopaedic support, and the 3,750 individually pocketed springs the listing now shows, it's clearly aimed at people who want a steadier, more supportive sleep.

The orthopaedic support it offers is the perfect solution for people who need to get a good night's sleep who need a firmer base to help protect the back and neck so that they can be healthy and active. Firm pocket springs under tufted wool, cotton and hemp, with no foam to sink into, should keep your hips level when you're on your back, and several owners say it has been 'very good for my back'. Not everyone gets on with it. One couple who both sleep on their sides 'woke with aches', and another owner swapped to the medium-firm version after this one gave their partner hip pain, so if you're a lighter side sleeper this firmness could be a bit much.

Harrison Spinks is a luxury bedding company with over 100 years of experience in crafting high-quality mattresses. Each of the 3,750 pocket springs sits in its own cloth pocket and reacts independently, so I'd expect movement to stay local rather than travel across the bed, which is what you want from this sort of build. One owner could hear the springs click and feel them at the side of the mattress, but another reports 'Zero movement from the other side no matter weight difference'. That said, it's a hefty mattress and not the easiest to wrangle on your own, so rotating it is going to be a two-person job in most homes. This hypoallergenic mattress is designed for allergy sufferers to resist dust mites and other irritants, but if you're sensitive to smells, expect a bit of that 'new mattress' pong at first. With a 5 year guarantee, this mattress will provide you with all the comfort and peace of mind your body needs.

Corrections

When we get something wrong, we fix it and say so here. All corrections

11 October 2026
This mattress is now sold as the Knaresborough 3750. The listing now shows 3,750 pocket springs, where we had 3,250.
Why you can trust WantMattress We spend hours testing (and/or researching) every product or service we review, so you can be sure you’re buying the best. Find out more about how we test.

How does it feel?

Personalised feel depends on bodyweight. Adjust your weight below to get an indication of how the Harrison Spinks Knaresborough 3750 Pocket Ortho Mattress may feel.

SnoozeScore

Still not sure if the Harrison Spinks Knaresborough 3750 Pocket Ortho Mattress is suitable for you?

Answer 6 quick questions to see how well this mattress fits you, and which mattresses fit you better.

Price history

The price graph displays the lowest price over time excluding shipping.

Lowest price we've recorded: £594.28
Lowest in the last 90 days: £684.00

How it scores
Of The Harrison Spinks Knaresborough 3750 Pocket Ortho Mattress
Scored from the build and owner reviews: each measure starts from how this construction usually performs, then moves with what owners of this mattress report against owners of similar mattresses.
Scored from the build and owner reviews: each measure starts from how this construction usually performs, then moves with what owners of this mattress report against owners of similar mattresses.

Suitability

  • Back Sleepers
    ★★★★★
    ★★★★★
  • The amount of support offered from a mattress will vary depending on the firmness of the tension and the type of support layer used. Based on a person of average build.
  • Side Sleepers
    ★★★★★
    ★★★★★
  • If you sleep on your side you typically need a supportive tension that is not too firm, nor too soft. This is because your hips and shoulders need adequate sinkage.
  • Stomach Sleepers
    ★★★★★
    ★★★★★
  • Stomach sleepers need a reasonable amount of tension in the base support layer to adequately offer body contouring and help prevent aches and pains. Results will vary based on your build.

Performance

  • Breathability
    ★★★★★
    ★★★★★
  • Mattresses that feature breathable materials help promote airflow and keep you cool making for a more hygienic night's sleep.
  • Turning on mattress
    ★★★★★
    ★★★★★
  • Certain materials like memory foam can make it difficult to move about on the mattress while you toss and turn. Same too for pillow tops which can create a cloud like sensation which can make manoeuvrability challenging.
  • Stability
    ★★★★★
    ★★★★★
  • Depending on the type of support layer in place can have an impact on stability, edge to edge support and roll together prevention. Pocket springs of a firmer tension will have better stability than open coil soft tension, for example.

Ease of Use

  • Turning handles
    ★★★★★
    ★★★★★
  • Mattresses typically need to be rotated frequently and having turning handles can be massively beneficial, particularly in larger sizes which can become fairly heavy.

Odour

  • Initial Odour
    ★★★★★
    ★★★★★
  • Materials in mattresses, particularly memory foam and rolled bed-in-a-box mattresses can have an initial odour, this is typically short term and reduces considerably within 24 hours.
  • Long Standing Odour
    ★★★★★
    ★★★★★
  • Certain materials inside different mattresses can produce a small odour. Typically this is short term rather than long standing but there are minor exceptions.

Brand Rating

  • Overall Brand Rating
    ★★★★★
    ★★★★★
  • This is based on community driven customer reviews tied to product reviews and grouped together at a brand level to produce a score.
*Assuming average weight, suitability will vary dependant on body type, check your SnoozeScore above for a more tailored guide.
Radar analysis
Of The Harrison Spinks Knaresborough 3750 Pocket Ortho Mattress
Brand: Harrison Spinks
Retailer: Mattress Online
Delivery Time: Excellent
Delivery Charge: Excellent
Customer Sentiment: Good
Guarantee: Good
Radar Analysis looks at the product, brand and retailer against base norms established within the industry and determines where the product sits by way of established performance metrics.

Owners, by the numbers

Counted from 42 owner reviews of this mattress on retailer sites.

79%gave it 5 stars33 of 42 reviews
7.1%gave it 1 or 2 stars3 of 42 reviews
Middle thirdon price, at £749.00156 of 263 other pocket spring mattresses cost less today

Counted from reviews published on retailer listings. Each review counts once, even where a retailer shows it on several listings, and reviews left on WantMattress are not included. The method is set out in the reliability report.

Reviews

Let us know your thoughts on a product or view reviews from others.

4.6owner rating out of 542 reviewsOur rating 4.0/5
Verified Buyer
Verified by Mattress Online
5
After reading reviews I was sceptical as I was worried the edges would give in. On the first day I sat at the edge and it did leave a dent where I had been sitting but moments later it sprung back to original shape. For me this mattress is perfect. I needed a firm mattress and to add a little extra softness I bought a mattress topper. Very good night's sleep.
Verified Buyer
Verified by Mattress Online
5
I have been looking for a good quality pocket mattress for a while, needed one that was firmish to support my back, but didn't want to feel like the floor.After speaking with the a sales person they steered me in this direction and I couldn't be happier.My back is liking the mattress as is my sleep. A good buy.
Verified Buyer
Verified by Mattress Online
5
Mattress manages to be wonderfully supportive but wonderfully soft at the same time. I've always bought firm mattresses, and this feels like a good supportive orthopaedic but with a softer topper. It's the most comfortable I've ever had, and I'd definitely buy this brand again in future.
Verified Buyer
Verified by Mattress Online
5
An incredible mattress. It arrived vacuum packed and seemed a bit skinny but then sprang fully into life once unpacked. Could not be happier with the level of support and comfort.
Verified Buyer
Verified by Mattress Online
5
Had Harrison mattresses for years, wanted a firmer one and this did not disappoint.Oozes quality and way better than those foam mattresses.
Verified Buyer
Verified by Mattress Online
5
Comfort similar to that of a high end hotel, plenty of support, looks really well made, pleased with our purchase.
Verified Buyer
Verified by Mattress Online
5
Supportive and natural with superb build quality, happy customer who's sleeping well.
Verified Buyer
Verified by Mattress Online
5
The mattress materials seemed to be of reasonable quality and was well built
Verified Buyer
Verified by Mattress Online
5
Fantastically packaged. So comfortable. Really pleased with the mattress.
Verified Buyer
Verified by Mattress Online
5
So comfortable we are sleeping so much better
Verified Buyer
Verified by Mattress Online
5
Doesn't contain memory foam/sponge
Verified Buyer
Verified by Mattress Online
5
Feels a quality product
Kitty
Verified by Mattress Online
5
Good Points: Mattress manages to be wonderfully supportive but wonderfully soft at the same time. I've always bought firm mattresses, and this feels like a good supportive orthopaedic but with a softer topper. It's the most comfortable I've ever had, and I'd definitely buy this brand again in future. Improvement Points: Be prepared for the natural fillings to have a slight smell for the first couple of weeks. It's not unpleasant or 'chemical' in nature - bit like the smell of a wheat-filled pain relief pack when it's heated in the microwave, but much less strong. It soon fades.
John
Verified by Mattress Online
2
We tried the mattress in the shop and picked it over the medium/firm version. However when the mattress was delivered it was so firm it caused my partner hip pain. We contacted mattress inline via the 60 day sleep guarantee and they swapped it next day. The service was 5* and reason we buy all our mattresses via them. The new mattress is the medium firm and is super comfy even after the first night. Makes me think the first was faulty it was that hard and nothing like the shop one we tried.
Fazila
Verified by Mattress Online
5
Good Points: After reading reviews I was sceptical as I was worried the edges would give in. On the first day I sat at the edge and it did leave a dent where I had been sitting but moments later it sprung back to original shape. For me this mattress is perfect. I needed a firm mattress and to add a little extra softness I bought a mattress topper. Very good night's sleep.
Jimmy
Verified by Mattress Online
5
Good Points: I have been looking for a good quality pocket mattress for a while, needed one that was firmish to support my back, but didn't want to feel like the floor. After speaking with the a sales person they steered me in this direction and I couldn't be happier. My back is liking the mattress as is my sleep. A good buy.
Paul
Verified by Mattress Online
3
Good Points: The mattress materials seemed to be of reasonable quality and was well built Improvement Points: It just wasn't comfortable. My wife and I sleep on our sides. With this mattress we both woke with aches and particularly in the lower back. It gave limited support.
Peter
Verified by Mattress Online
1
Good Points: Doesn't contain memory foam/sponge Improvement Points: Needs a complete redesign. The mattress is too thin and leaves me with an aching lower back. Going to bed is not something I look forward to. Very conscious of springs...
Mrs Barton
Verified by Mattress Online
5
Awesome quality build. Comfort layers, warm wool, super spring support. Zero movement from the other side no matter weight difference. Just ensure you sleep on the right way up!! Label should be facing up, not on the bottom.
Angus
Verified by Mattress Online
5
Good Points: An incredible mattress. It arrived vacuum packed and seemed a bit skinny but then sprang fully into life once unpacked. Could not be happier with the level of support and comfort.
Alistair
Verified by Mattress Online
5
Excellent mattress! Delivered on time! The mattress is very comfortable! I'm so pleased I ordered it! It is very good for my back! It was a knaresborough 3,700 spring pocket, firm.
Guss
Verified by Mattress Online
5
Good Points: Had Harrison mattresses for years, wanted a firmer one and this did not disappoint. Oozes quality and way better than those foam mattresses.
Osadhi
Verified by Mattress Online
4
Lovely quality materials but less firm than expected. I really recommend you try this out before purchase as I would describe medium firm.
Claudia
Verified by Mattress Online
5
Good Points: Comfort similar to that of a high end hotel, plenty of support, looks really well made, pleased with our purchase.
Derrick
Verified by Mattress Online
5
Good Points: Supportive and natural with superb build quality, happy customer who's sleeping well.
Lorraine
Verified by Mattress Online
4
Good Points: Feels a quality product Improvement Points: Not being able to try it before buying
K A
Verified by Mattress Online
5
Good Points: Fantastically packaged. So comfortable. Really pleased with the mattress.
Robert
Verified by Mattress Online
5
Good Points: So comfortable we are sleeping so much better Improvement Points: No
Dr Thirlaway
Verified by Mattress Online
2
It feels a bit lumpy and smells like a barn (presumably due to the wool?)
Joan
Verified by Mattress Online
5
This review contains a rating only; no comment was left by the customer.
Dale
Verified by Mattress Online
5
This review contains a rating only; no comment was left by the customer.
Clifford
Verified by Mattress Online
5
This review contains a rating only; no comment was left by the customer.
Michael
Verified by Mattress Online
5
This review contains a rating only; no comment was left by the customer.
Peter
Verified by Mattress Online
5
This review contains a rating only; no comment was left by the customer.
Kate
Verified by Mattress Online
5
This review contains a rating only; no comment was left by the customer.
Adrian
Verified by Mattress Online
5
This review contains a rating only; no comment was left by the customer.
Kevin
Verified by Mattress Online
4
This review contains a rating only; no comment was left by the customer.
Marc
Verified by Mattress Online
4
This review contains a rating only; no comment was left by the customer.
Nabeela
Verified by Mattress Online
3
This review contains a rating only; no comment was left by the customer.
Jennifer
Verified by Mattress Online
5
Good Points: Natural materials Improvement Points: More padding
Mr Magee
Verified by Mattress Online
5
This mattress is very good for my back i love it
Clive
Verified by Mattress Online
5
Great mattress. Really comfortable.

Questions and answers about the Harrison Spinks Knaresborough 3750 Pocket Ortho Mattress

Common questions answered by our team first, then questions shoppers asked the retailer, with the retailer’s own answers.

Image of the post author
Common question
Are there any noted allergens in the materials used for this mattress?

Answer: This mattress is hypoallergenic, which means no allergenic materials were used in its creation. This feature provides a cleaner, healthier sleep environment, reducing the risk of allergy reactions or respiratory discomfort.
Image of the post author
Common question
How durable is this mattress?

Answer: The Harrison Spinks Knaresborough mattress is constructed with hemp, a durable eco-friendly fibre. Combined with the tufted design of the mattress, these features enhance its long-term durability.
Image of the post author
Common question
How does this mattress perform in different temperature conditions?

Answer: The mattress uses hemp and wool, both natural insulators that adapt to varying temperatures, helping to create a comfy sleeping environment throughout the year.
Image of the post author
Common question
Would this mattress' firmness be suitable for a side sleeper?

Answer: This mattress has a firm tension which may not be suitable for side sleepers, as it's designed to best suit back sleepers who need orthopaedic support.

Videos about this mattress

Hand picked video that relates to the specifications of The Harrison Spinks Knaresborough 3750 Pocket Ortho Mattress

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Alternative products with similar specifications

We have handpicked some alternate options that should perform equally well that are worthy of consideration if you are interested in the Harrison Spinks Knaresborough 3750 Pocket Ortho Mattress.

Guides this mattress is featured in

This mattress is listed in 2 of our guides because its build meets what each guide looks for. Each card says what that is.

How we reviewed this product

At WantMattress, we adhere to stringent sourcing standards, drawing from peer-reviewed research, scholarly institutions, medical associations, and firsthand accounts and experience. We refrain from using tertiary sources. To understand how we maintain the accuracy and up-to-date nature of our content, please read further about how we test.

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