Gainsborough Mayfair 5000 Pocket Mattress
The Gainsborough Mayfair 5000 Pocket Mattress combines 5,000 pocket springs with cashmere, wool and silk fillings, which means a medium-feel bed with a soft natural-fibre surface and responsive support underneath.
- Medium feel for back & side sleepers
- Responsive give from mini pocket springs
- Natural cashmere, wool & silk surface
£908
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The Gainsborough Mayfair 5000 is a premium pocket-sprung mattress with a medium feel, made with cashmere, wool, silk and cotton fillings. It has a hand side-stitched, tufted damask cover and is 33cm deep. It comes in UK Single, Small Double, King and Super King. Mattress Online offers a 100-night comfort trial, and Gainsborough gives a 10-year guarantee.
Mattress specifications
Firmness
Medium
Type
Pocket Spring
Depth (cm)
Number of Layers
Trial Period (nights)
Warranty (years)
Price Range
£908
Best Sleeping Position(s)
Side Sleeping
Back Sleeping
Combination Sleeping
Certifications
Why should you choose this mattress?
The springs do most of the work here. Mini pocket springs sit near the surface for a responsive layer of give, with larger pocket springs below, so it should feel supportive without being stiff. The cashmere, wool and silk on top add a soft, natural-fibre surface. It's double-sided with turning handles, so you can turn it to spread wear. It also carries BS 7177:2008 and National Bed Federation Approved Brand certification. Suits most back sleepers and many side sleepers at a medium feel, although very light side sleepers may want something a little softer.
Key features & layer details
Damask cover
A damask cover, hand side stitched with a tufted finish. It gives a smooth, finished surface and keeps the fillings held in place.
Cashmere, wool and silk layer
A natural-fibre layer of cashmere, wool and silk at the surface. It gives the mattress a soft feel under you.
Wool and cotton comfort layer
A comfort layer of wool and cotton fibres, with soft polyester fibres. It adds cushioning between the surface and the springs.
Mini pocket springs
4,000 mini pocket springs (king size count) near the surface. They add a responsive layer of give that moves with you.
Pocket springs
1,000 pocket springs in individual fabric pockets (king size count), with two wire rods in the border. The springs support each part of your body separately, and the rods help the edge hold up when you sit or sleep near it.
Layer details from mattressonline.co.uk product page, October 2026.
Best suited for?
Back sleepers
The medium feel and pocket springs that support each part of your body separately suit this position, keeping you held up without the surface feeling stiff.
Side sleepers
Mini pocket springs near the surface give a responsive layer of give, which means shoulders and hips can sink in a little at a medium feel.
Couples
Individual pocket springs support each part of the body separately, and the two wire rods in the border help the edge hold up when you sit or sleep near it.
Combination sleepers
Mini pocket springs add a responsive layer of give that moves with you, and the double-sided build with turning handles lets you spread wear evenly.
If you prefer sleeping on a firm mattress, this might not be the best choice, as it's rated medium. If you want a foam or memory-foam feel that hugs the body, the spring-and-fibre build here will feel different. Anyone avoiding wool, cashmere or silk should also pick a different filling.
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.
Gainsborough Mayfair 5000 Pocket Mattress
Last seen for £634 at Mattress Online on 25th June 2026
Last seen for £1,028 at Mattress Online on 25th June 2026
Last seen for £1,144 at Mattress Online on 25th June 2026
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FAQ's
How firm is the Gainsborough Mayfair 5000?
It's rated medium. That suits most back sleepers and many side sleepers, although anyone who wants a firm, flat feel or a much softer cradle may prefer a different rating.
What sizes does the Gainsborough Mayfair 5000 come in?
It comes in UK Single, UK Small Double, UK King and UK Super King. Spring counts are quoted for a king size, so other sizes will differ slightly.
How deep is the Gainsborough Mayfair 5000?
It's 33cm deep. That's a fairly substantial mattress, so check your bed frame and any fitted sheets you plan to reuse will fit a depth like that.
What is the Gainsborough Mayfair 5000 made of?
It has 5,000 springs in total: 4,000 mini pocket springs and 1,000 pocket springs at king size. They sit under cashmere, wool, silk, cotton and soft polyester fibres, with a damask cover.
Does the Gainsborough Mayfair 5000 come with a trial or guarantee?
Gainsborough gives a 10-year guarantee. Mattress Online offers its own 100-night comfort trial, so that trial depends on buying from them and follows their terms.
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