# Doublelife King Size Mattress 5FT, 10.2 Inch Gel Memory Foam, 9 Zone

Source: https://www.ranked10.co.uk/home/best-mattress-for-side-sleepers/doublelife-dearest
Ranked #9 in "Best Mattress for Side Sleepers 2026: Two Say Extra Firm": https://www.ranked10.co.uk/home/best-mattress-for-side-sleepers

- Price: £298.99 (checked on Amazon UK on 2026-09-13)
- Amazon rating: 4.5 from 87 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0H57WSGP7?tag=ranked10-21

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.

## Specification

| Field | Value |
|---|---|
| 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 |

## 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.