Last seen for £464 at Mattress Online on 25th June 2026
Gainsborough Mayfair 1000 Pocket Ultra Firm Double Mattress
The Gainsborough Mayfair 1000 Pocket Ultra Firm Mattress pairs 1,000 pocket springs with a dense polyester pad, which means you get a flat, extra-firm feel with support that adapts to your body.
- Very firm, flat sleeping surface
- Minimises partner disturbance
- Cover that doesn't hold heat
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
More available sizes
Last seen for £538 at Mattress Online on 25th June 2026
Last seen for £464 at Mattress Online on 25th June 2026
Mattress details
Mattress
Gainsborough Mayfair 1000 Pocket Ultra Firm Mattress
Size
Firmness
Extra Firm
Construction
Pocket Spring
Depth (cm)
Layers
Layer Details
Damask cover
A finely woven, durable fabric that's soft to touch and doesn't retain heat. That means a comfortable surface that stays fairly cool.
Soft White Fibres
A soft synthetic polyester filling that's durable and resilient and keeps its shape. It adds a cosy feel on top of the firm base.
Dense polyester pad
A dense, breathable polyester pad that firms up the feel and adds airflow. It helps keep the surface flat and the mattress lasting longer.
Pocket springs
A core of 1,000 pocket springs, counted on a king size, each in its own fabric pocket. They move independently to give support suited to your body and reduce motion transfer.
Layer details from mattressonline.co.uk product page, October 2026.
Key benefits
This size suits you if...
Consider another size if...
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's