Rank #5 in Best Mattress for Side Sleepers 2026: Two Say Extra Firm
Doublelife King Size Mattress 5FT, 11 Inch Gel Memory Foam, 9 Zone
Price and rating as shown on Amazon when we collected them. Both change.
The Doublelife king size mattress costs £189.99 and is rated 4.7 stars from 250 ratings, with nine zones, gel memory foam and an eleven inch profile.
It takes fifth because its record is strong and its thickness is not settled: twenty-seven centimetres in one field, twenty-eight in the next, and eleven inches — 27.9 — in its name.
How those 250 ratings break down
An average hides its own shape. This is the spread behind the 4.7 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Depth | 27cm in one field, 28cm in the next |
|---|---|
| Ratings | 4.7 from 250 |
| Support | Nine pocket spring zones |
| Construction | Gel memory foam over springs |
| Weight | 28.5 kg |
| Layers | 12 |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“My son’s a big lad. He says it’s very comfortable.”
Verified purchase“Yes it is very comfortable and I am sleeping better”
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
How deep is it?
The fields say 27 and 28; the name says eleven inches, which is 27.9.
Is it firm?
Medium firm is the phrase used across this market; this page relies on nine zones.
How is it rated?
4.7 stars from 250 buyers.
Does it have springs?
Yes, nine zones of pockets.
Why is it fifth?
Because the record is good and the depth is a coin toss between two fields.
How many ratings does it have?
250 at the time of collection, averaging 4.7 stars, with 87 per cent five-star and 3 per cent one-star.
Comments
Reader comments are not checked against the manufacturer's claims above.
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