Rank #9 in Best Mattress for Side Sleepers 2026: Two Say Extra Firm
Doublelife King Size Mattress 5FT, 10.2 Inch Gel Memory Foam, 9 Zone
- Rating
- 4.5
- Ratings
- 87
- Rank
- #9
Price and rating as shown on Amazon when we collected them. Both change.
The Doublelife king size mattress costs £298.99 and is rated 4.5 stars from 87 ratings, with nine pocket spring zones, gel memory foam and a twenty-six centimetre depth.
It takes ninth because it is the dearest mattress in this article and states no more about itself than mattresses costing half as much — no spring count, no density, no guarantee, no certification.
How those 87 ratings break down
An average hides its own shape. This is the spread behind the 4.5 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £298.99 |
|---|---|
| Construction | Nine zones, gel foam over springs |
| Evidence | 4.5 stars from 87 ratings |
| Dimensions | 2 x 1.5 x 0.26 metres, and 200 x 150 x 26cm |
| Layers | 12 |
| Missing | No spring count, density, guarantee or certification |
What it is up against
The rivals it was ranked against in Best Mattress for Side Sleepers 2026: Two Say Extra Firm.
Rank #1
Inofia Double Mattress, 12 Inch Memory Foam Sprung, Medium Firm
£169.99
Rank #2
Twirest Hybrid Double Mattress 4FT6, Cotton Comfort Layer, 22cm
£129.99
Rank #3
dosleeps King Size Mattress 5FT, 9-Zone Orthopedic, 22cm
£159.99
Rank #4
Double Mattress 4FT6, 12 Inch Medium Firm Hybrid, 7 Zone Support
£162.99
Questions people ask
Why does it cost £298.99?
The listing does not say.
Is it better than the £149.99 mattress here?
The specifications are equivalent.
How deep is it?
Twenty-six centimetres.
How is it rated?
4.5 stars from 87 buyers.
Why is it ninth?
Because a price without a specification is the whole of its problem.
How many ratings does it have?
87 at the time of collection, averaging 4.5 stars, with 80 per cent five-star and 5 per cent one-star.
Comments
Reader comments are not checked against the manufacturer's claims above.
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