Sealy Tredwell Extra Firm Mattress

Sealy Tredwell Extra Firm Mattress Product Description

Sealy Tredwell Extra Firm Mattress is the firmest feel in the Elevate Ultra Collection, crafted for those who prefer a truly supportive, grounded sleep. Combining intelligent sleep technology with advanced comfort layers, it delivers deep, consistent support that adapts to your body for a more restorative night’s rest.

At its core is Sealy’s patented AlignSupport® spring system, designed to sense your shape and respond with tailored, long-lasting support that helps maintain natural posture and skeletal alignment. Reinforced with UniCased® XT edge support, the mattress offers a stable, edge-to-edge sleep surface with no “roll-off” feeling, while enhancing airflow for a fresher sleep environment.

Comfort is carefully balanced with durability. Targeted pressure relief comes from the MemorySense® ComfortCore®, focused on the hips and lower back, while gel-infused and extra firm foam layers provide breathable, long-lasting comfort. Finished with a luxurious quilted surface and soft-touch fabric, Tredwell also features SmarTex® technology to regulate temperature and ProShield® protection for a cleaner, more hygienic sleep.

Handmade in Britain and backed by a 7-year guarantee, Tredwell Extra Firm is built to deliver reliable performance night after night.

Extra firm feel – ideal for those who prefer strong, supportive comfort

Mattress depth 29cm

Key Features:

• Extra firm feel – ideal for those who prefer strong, supportive comfort
• AlignSupport® coil system – two-stage response for personalised support
• UniCased® XT edge support – maximises sleep surface and prevents roll-off
• MemorySense® ComfortCore® – targeted pressure relief for hips and lower back
• Gel-infused foam – breathable comfort to help regulate temperature
• BasePlank foundation – enhances airflow and long-term durability
• SmarTex® fabric – helps maintain a cool sleeping environment
• ProShield® protection – guards against allergens for a fresher sleep
• Quilted, soft-touch cover – adds a layer of luxury and comfort
• Four vertical handles – easy to move and position
• Handmade in Britain with a 7-year guarantee

Dimensions:

• (W) 135cm x (D) 190cm x (H) 29cm - Double (135cm)
• (W) 90cm x (D) 190cm x (H) 29cm - Single (90cm)
• (W) 150cm x (D) 200cm x (H) 29cm - Kingsize (150cm)
• (W) 180cm x (D) 200cm x (H) 29cm - Superking (180cm)

All screens vary in colour reproduction and whilst every effort has been made to display the colour as accurately as possible it is for guidance only.

Mattress Delivery

A two-person delivery is required for mattresses. This costs £35. Our delivery service is a "white-glove service", and will be made to your room of choice.

Delivery will take between 5 - 10 working days for in-stock items.  For items that are not in stock but available to order, the delivery timescales will be confirmed in the checkout. 

Deliveries to some remote postcodes are possible, and carry an additional premium delivery charge. This will be charged in checkout, but please contact us if you have any questions. 

Please note that we do not offer free returns, so unless there is a fault with your item, then you will be required to cover the cost of returning it to us, or for us to collect the item. 

Please also be aware that if it is not possible to gain access to the room of choice, with the product, then the cost of that failed delivery is met by the customer. 

Click & Collect In-Store

Click and Collect is free, and is available on most of our non-furniture items, although please note that some exceptions do apply. If the product qualifies, then the option will be offered during the checkout, after you have entered your billing details. 

If you would like to collect furniture, then please do not hesitate to contact us and we will do our best to arrange this.

You can choose to pay by finance on this product, enabling you to you spread the cost with either an Interest free option or an Interest bearing one. Once you add the product to your order, you can choose the “Apply for Finance" button, which is one of the payment options in the checkout. 

Interest Bearing Option

Choose this option if you want to spread your payments for up to 60 months!

• A minimum 10% deposit would be required.
• The interest rate is 9.9% APR.
• Then just choose the time period over which you want to pay the loan back.
• The monthly amount you need to pay, would be clearly demonstrated to you before you decide.

Interest Free Option

Choose this option if you want to avoid any interest charges on your loan amount.

• A minimum 25% deposit is required.
• For a spend of £1,200-£1,799 you can spread your payments over 12 months.
• For a spend of £1,800-£2,399 you can spread your payments over 18 months.
• For a spend of £2,400-£2,999 you can spread your payments over 24 months.
• For a spend of £3,000-£3,599 you can spread your payments over 30 months.
• For a spend of £3,600+ you can spread your payments over 36 months.

For our Finance FAQs and more details please click here. 

Please note that our Finance choices online are slightly different to those in our stores. For details of our in-store offering, please contact us.