Deal verdict
The Rock Hard Ultra Firm Mattress is the better deal today.
It is at its usual price, while the Dorma Natural 2000 Pocket Sprung Wool Mattress has been cheaper. The Rock Hard Ultra Firm Mattress costs £140 less today.
Mattress Online
Usual price
£369 Double
£369 is the usual price. You can safely ignore any countdown timer. It's been £369 or less for 100% of the 61 days we've tracked.
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Dunelm
Worth waiting
£509 Double 4ft 6 · Pocket sprung
It's been cheaper. It was £409 on 13 Nov 2026. It's been £509 or less for 100% of the 89 days we've tracked.
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| Rock Hard Ultra Firm Mattress | Dorma Natural 2000 Pocket Sprung Wool Mattress | |
|---|---|---|
| Firmness | Extra firm | Not stated |
| Warranty | 3 years | 20 years |
| Mattress type | Not stated | Pocket sprung |
| Sizes | Single, Small Double, Double, King, Super King | Single 3ft, Small Double 4ft, Double 4ft 6, Kingsize 5ft, Super Kingsize 6ft |
Specs are the figures each retailer publishes. Prices are for the size shown above.