Deal verdict
The Dormeo Octasmart Premium Plus Mattress is the better deal today.
It is at a genuine low, while the Sealy Alford Advantage Mattress has been cheaper. The Dormeo Octasmart Premium Plus Mattress costs £1 less today.
Mattress Next Day
Good time to buy
£313 Double
£313 is a genuine low. Today is the only day in the 72 days we've tracked it's been this cheap.
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Mattress Online
Worth waiting
£314 Double
Shown as reduced from £335
It's been cheaper. It was £294 on 12 Nov 2026. It's been £314 or less for 48% of the 122 days we've tracked.
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| Dormeo Octasmart Premium Plus Mattress | Sealy Alford Advantage Mattress | |
|---|---|---|
| Firmness | Medium | Firm |
| Warranty | 18 years | 5 years |
| Sizes | Size not stated, Single, Double, King | Double, Single, King, Super King |
Specs are the figures each retailer publishes. Prices are for the size shown above.