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The Sealy Advantage Classic mattress combines supportive springs and layers of zoned foam for a blissful night’s sleep.
Inside this mattress is Sealy's unique PostureTech Core Support spring system. The springs are weight responsive and get firmer as pressure increases to offer deep down support that’s long-lasting.
The zoned foam layer targets the key areas of your body and applies support where you need it the most.
Finished with a quilted sleep surface, the mattress offers luxurious comfort night after night.
The mattress is also single sided. Simply rotate it from time to time to improve its lifespan.
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Sealy 5 Year Guarantee
In the unlikely event of a defect in material or workmanship occurring within the 5 year guarantee period, we will arrange to repair or replace the item under complaint free of charge at our discretion.
Free delivery Tomorrow, 26th April
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Old mattress removal available
Delivery to room of choice available
133,230+ Trees planted so far
Rated Excellent
/5 based on 179 reviews
Verified
Bought as a gift for daughter. So impressed so ordered another for my grandson
Verified
Really comfortable mattress
Verified
The mattress is perfect - good quality and a fantastic price
Verified
What we wanted
Verified
Good mattress for the price. Comfortable and reliable so far
Verified
Comfy new mattress smell is bit strong .. Needs airing well went from sealy modena to this.. Both medium firmness but this is softer. Delivery prompt and easy. Sealy make great mattresses.
Sealy Airflow Memory Foam Pillow
DreamEasy Luxury 10.5 Tog All Seasons Duvet
DreamEasy Luxury Quilted Mattress Protector
Sealy Anti-Allergy Pillow - 2 Pack
133,230+ Trees planted so far
Award winning delivery
Planet-friendly disposals
Buy now, pay later with Klarna
18+, T&Cs apply, Credit subject to status
Sealy Airflow Memory Foam Pillow
4.7 (3)
DreamEasy Luxury 10.5 Tog All Seasons Duvet
4.6 (20)
DreamEasy Luxury Quilted Mattress Protector
4.7 (76)
Sealy Anti-Allergy Pillow - 2 Pack
4.5 (2)
| Size | Imperial | Metric |
|---|---|---|
| Small Single | 2'6" x 6'3" | 75cm x 190cm |
| Single | 3' x 6'3" | 90cm x 190cm |
| Small Double | 4' x 6'3" | 120cm x 190cm |
| Double | 4'6" x 6'3" | 135cm x 190cm |
| King Size | 5' x 6'6" | 150cm x 200cm |
| Super King | 6' x 6'6" | 180cm x 200cm |
| European Small Single | 2'8" x 6'6" | 80cm x 200cm |
| European Single | 3' x 6'6" | 90cm x 200cm |
| European Double | 4'7" x 6'6" | 140cm x 200cm |
| European King Size | 5'3" x 6'6" | 160cm x 200cm |
All mattress sizes given are approximate and stated sizes refer to the sleeping surface only. Mattresses sizes may vary slightly from their stated dimensions due to manufacturing tolerances, please allow +/- 2 inches (5cm).
You can spread the cost of purchases over £400 without any fees or interest thanks to our partnership with Klarna, a payment service provider.
Available payment options
18+, T&Cs apply, Credit subject to status. Bedsonline.biz Ltd is authorised and regulated by the Financial Conduct Authority (FCA FRN 710091) and acts as a credit intermediary and not a lender, offering credit products provided exclusively by Klarna Bank AB (publ). Finance is only available to permanent UK residents aged 18+, subject to status, terms and conditions apply. Klarna’s [Pay in 3 instalments] [and] [Pay in 30 days] are unregulated credit agreements.Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. Ts&Cs and late fees apply.
*Delivery charges may apply for some areas. Please see our delivery page for more information.
1. Order by 5pm for next day delivery between Monday-Friday, 12pm on Saturday and 3pm on Sunday. The 'Order by' time may be subject to change dependant on our delivery partners.
Bedsonline.biz Ltd is authorised and regulated by the Financial Conduct Authority (FCA FRN 710091) and acts as a credit intermediary and not a lender, offering credit products provided exclusively by Klarna Bank AB (publ). Finance is only available to permanent UK residents aged 18+, subject to status, terms and conditions apply.
