Deal verdict
The Emma Original Classic Mattress is the better deal today.
It is at a genuine low, while the Sealy Harlow Ortho Plus Mattress has been cheaper. The Sealy Harlow Ortho Plus Mattress costs £72.75 less today.
Mattress Online
Worth waiting
£429 Double
It's been cheaper. It was £374 on 13 Nov 2026. It's been £429 or less for 100% of the 33 days we've tracked.
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Emma
Good time to buy
£501.75 Double
£501.75 is a genuine low. It's been this cheap for only 5% of the 37 days we've tracked.
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| Sealy Harlow Ortho Plus Mattress | Emma Original Classic Mattress | |
|---|---|---|
| Firmness | Firm | Not stated |
| Warranty | 5 years | 10 years |
| Layers | Not stated | 3 |
| Sizes | Single, Small Double, Double, King, Super King | Single, Small Double, Double, King, EU Double, Queen, Super King |
Specs are the figures each retailer publishes. Prices are for the size shown above.