Deal verdict
Too early to call.
We need 30 days of prices for the Sealy Advantage Quartz Memory Mattress before judging the deal.
Mattress Next Day
Not enough history yet
£359 Double · Memory foam
£359 today. We started tracking this on 15 Nov 2026. Its verdict is due in 29 days, once we have 30 days of prices.
The chart appears once we have more than one day of prices. We started tracking this on 15 Nov 2026.
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Mattress Next Day
Good time to buy
£399 Double
£399 is a genuine low. Today is the only day in the 32 days we've tracked it's been this cheap.
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| Sealy Advantage Quartz Memory Mattress | Sealy Advantage Topaz Natural Mattress | |
|---|---|---|
| Firmness | Medium firm | Medium |
| Mattress type | Memory foam | Not stated |
| Warranty | 5 years | 5 years |
| Sizes | Size not stated, Single, Small Double, Double, King, Super King | Size not stated, Single, Double, Small Double, King, - Super King, - Super King Zip & Link |
Specs are the figures each retailer publishes. Prices are for the size shown above.