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Gainsborough Mayfair 5000 Pocket Mattress
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Gainsborough Mayfair 5000 Pocket Mattress

FirmnessMedium
ConstructionPocket sprung

In shortFor average-weight front sleepers, I like the medium pocket-sprung build and stable edges, though wool and cashmere could feel too warm if you overheat. Read the review

Single
Double
King Size
Super King
Reveal Offer Price and Go To Site *
100-night comfort trial at Mattress OnlineConditions
Remedy
An exchange, not a refund
When
After 30 nights' use
Condition
Buy a mattress protector from Mattress Online with the mattress
Old mattress removal
£35
Delivery
Free; to the room of your choice £20

Checked on Mattress Online's site, 10 October 2026. Full terms at Mattress Online

What our reviewers found

Pros

  • The blend of 1000 traditional pocket springs and 4000 mini pocket springs provides tailored support and adapts comfortably to body movements.
  • Natural fibres like wool, cotton, cashmere, and silk offer durable, breathable comfort that suits warm and cold nights.
  • The Ultimate Freshness anti-allergy treatment protects against dust mites to ease skin irritation.
  • The PowerEdge perimeter firms up the edge, so you can use more of the width.
  • The hand side stitching secures the spring unit, adding durability and stability.

Cons

  • Since this mattress features both wool and cashmere, it may run the risk of becoming too warm for individuals who have tendencies to overheat during the night or who live in warmer climates.
  • The Gainsborough Mayfair 5000 Pocket Mattress also has a medium firmness rating, which might not provide enough support for heavier individuals or those who prefer a firm sleeping surface for optimal spinal alignment and pain relief.
  • With a depth of 33cm, this mattress is relatively thick, and it might be a challenge fitting regular bedsheets around it, necessitating the purchase of deep pocket sheets.

It's the foundation of our slumber, a base of comfort and support, that's imperative to the quality of our sleep. Meet the Gainsborough Mayfair 5000 Pocket Mattress - a mattress that claims to cater to the needs of the body, promising optimum support and comfort. Boasting a generous amount of pocket springs, this mattress carries with it a potential air of regality and dedication to providing a premium sleep experience. Still, as an experienced mattress reviewer, it's best not to get bedazzled by sheer numbers and instead look closely at the elements that dictate the quality of a mattress. Here that means 1000 traditional pocket springs doing the supporting and 4000 mini springs up in the comfort layers, so I'd judge it on the wool, cotton, cashmere and silk on top and the 33cm depth before the big number.

Design and Features

The Gainsborough Mayfair 5000 Pocket Mattress offers a sumptuous blend of closely designed components, contributing to various aspects of comfort, support, and longevity. The central highlight is the 1000 traditional pocket springs supplemented by 4000 mini pocket springs, ensuring a high degree of reactive support. Each spring moves on its own, so the mattress follows your shape instead of sagging as one unit.

Made with an assortment of natural fibres including wool, cotton, cashmere, and silk, the mattress promises a dual-functional benefit of luxurious comfort and year-round convenience. Wool and cotton tend to not only wick away moisture but also offer sterling durability, while the blend of cashmere, wool, and silk insulates in cold and breathes easy in the summer.

Despite its long list of features, the mattress does a lot when it comes to promoting a healthy sleep environment. Its Ultimate Freshness anti-allergy treatment aims to protect sleepers against dust mites, reducing possible irritations. Complementing the craftsmanship is the PowerEdge design which bolsters the mattress stability, ensuring an uninterrupted stretchable space free from the risk of rolling-off.

Mattress Comfort

The Gainsborough Mayfair 5000 Pocket Mattress seems to strike a promising balance between plush comfort and firm support. While layers of wool, cashmere, and silk infuse an inviting cushioned comfort, the host of springs is envisioned to provide a steadfast support. Interestingly, the presence of a high number of pocket springs supplies not just support, but a highly distributed and precise one. This granular support system can potentially make every inch of your body feel equally supported and rested.

However, keeping things realistic, remember that comfort can be a highly subjective aspect. What feels like a cloud to one person may seem like a rock to another. But given the medium firmness rating, this mattress should appeal to a wide range of sleepers, providing a balanced feel that supports your body while also giving you a comfortable surface to sleep on.

Suitability

The Gainsborough Mayfair 5000 Pocket Mattress represents a medium firmness that strikes a favourable chord with back and side sleepers. With an optimised support system, the mattress is poised to offer substantial contouring and support, promising to reduce the pressure on the vulnerable pressure points. Average-weight sleepers should find sleeping on this mattress fairly comfortable, regardless of their sleep position. However, back sleepers might prefer a slightly firmer product for an enhanced sense of contouring and support.

What Customers Thought

Being transparent with our review process, I couldn't find enough genuine customer reviews to quote here with confidence, so I've left them out rather than guessing.

The Verdict

The Gainsborough Mayfair 5000 Pocket Mattress shows promise as a designed-to-deliver medium firmness mattress aspiring for optimum support and comfort using a blend of traditional and mini pocket springs. Its ambitious foray into sustainable luxury with layers of natural fibres adds to its lure, while the hypoallergenic traits work towards establishing a healthier sleeping environment.

However, it's easy to get swept away by the plush marketing phrases, so I'd stay grounded in the reality of individual comfort levels and preferences. Also, without direct customer reviews, opting for this mattress might feel like treading in an uncharted territory for some. If you are considering this mattress, the key is to interpret your sleeping needs accurately and match them with what this mattress has to offer.

The Gainsborough Mayfair 5000 Pocket Mattress appears to be a worthy contender for a lot of sleepers. It represents a strategic blend of support, comfort, and health-friendly features that seems poised to deliver quality sleep to a broad spectrum of sleepers. Only time (and hopefully a deluge of customer reviews) will reveal whether it truly stands up to the test of 'real-world' usage.

How we reviewed the Gainsborough Mayfair 5000 Pocket Mattress

10+ years in the mattress industry26-point spec checkBenchmarked against 346 pocket-sprung mattresses5 buyer questions read43 price checks since Jun 2025

Drawing on over 10 years in the mattress industry, our team judged the construction, materials and firmness of the Gainsborough Mayfair 5000 Pocket Mattress point by point from its 26-point specification and Mattress Online's listing, and benchmarked it against 346 other pocket-sprung mattresses we track. We have checked its price 43 times since June 2025. How we review

How does it feel?

Personalised feel depends on bodyweight. Adjust your weight below to get an indication of how the Gainsborough Mayfair 5000 Pocket Mattress may feel.

SnoozeScore

Still not sure if the Gainsborough Mayfair 5000 Pocket 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 chart shows the lowest price we recorded over time. Prices exclude delivery.

Check today's price at Mattress Online
How it scores
of the Gainsborough Mayfair 5000 Pocket Mattress
Scored from the build: how this construction usually performs, compared with mattresses of a similar type and price.
Scored from the build: how this construction usually performs, compared with mattresses of a similar type and price.

Suitability

  • Back Sleepers 4/5
  • 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 5/5
  • 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 4/5
  • 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 4/5
  • Mattresses that feature breathable materials help promote airflow and keep you cool making for a more hygienic night's sleep.
  • Turning on mattress 5/5
  • 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 4/5
  • 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 5/5
  • 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 4.5/5
  • 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 5/5
  • Certain materials inside different mattresses can produce a small odour. Typically this is short term rather than long standing but there are minor exceptions.
*Assumes average weight. Suitability is dependent on body type, so check your SnoozeScore above for a more tailored guide.
Radar analysis
of the Gainsborough Mayfair 5000 Pocket Mattress
Brand: Gainsborough
Retailer: Mattress Online
Delivery Time: Excellent
Delivery Charge: Excellent
Guarantee: Excellent
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.

Owner reviews and questions

Nobody has reviewed the Gainsborough Mayfair 5000 Pocket Mattress here or asked about it yet.

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Tell other buyers how it sleeps: the feel, how it has held up and whether you would buy it again.

Have a question?

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Videos about this mattress

Hand picked video that relates to the specifications of The Gainsborough Mayfair 5000 Pocket Mattress

What are Pocket Springs?
What are Pocket Springs?
By BedStar
What is Hypoallergenic?
What is Hypoallergenic?
By Karen Kelley Perkins
Mattress Online
Mattress Online
By Mattress Online

Sources for this review

  • Our assessmentConstruction, materials and firmness judged by our team, from over 10 years in the mattress industry
  • Specification26 points from Mattress Online's listing
  • Buyer questions5 read
  • Price history43 checks since June 2025
  • BenchmarkCompared with 346 other pocket-sprung mattresses we track
  • Site-wideOur price tracker has logged 1,314,947 retailer prices since June 2019

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