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Comfort trial

Comfort fillings
Firmness rating

Support system
Sealy's PostureTech Core Support Springs merge with zoned PowerPack technology to provide orthopaedic lumbar support and a premium firmer feel.

An innovative spring design from the specialists at Sealy that uses unique shapes and varied tension to provide excellent full-body support and pressure relief.

Helping to promote a healthy sleeping position. Orthopaedic support is specially designed to provide enhanced spinal alignment, joint support and improve posture.
Our firmest rating. Highly supportive with a very firm, sturdy feel

Soft synthetic fillings create an incredible cosy feel. These fillings are durable and resilient, maintaining its shape and quality. A great balance between comfort and value for money.

Durable edge-to-edge support provides a maximised sleeping surface for a more secure sleep. Sit and lay comfortably right to the very edge with zero 'roll-off' sensation.

Stitched into the mattress border, turning handles are there for easier moving and turning. When caring for your mattress, simply use the handles provided for ease of use.

A traditional and elegant design that holds fillings in place whilst enhancing the stability of the mattress. The luxurious tufting ensures zero shifting, shape loss or sagging.

About 11.4 inches deep. Depth is an important factor when buying a mattress as it can affect the suitability for particular bedding, mattress toppers and bed frames.

A damask cover is a finely woven and durable fabric that is soft to touch. This cover doesn't retain heat and has a long-lasting performance.

For your peace of mind

Expertly handcrafted in the UK. This product helps to support our economy and helps to reduce environmental impact.

This product conforms to BS7177: 2008, for use at home

For the highest standards of quality and safety
The top of the new Sealy Ortho range is the Sealy Steeple Ortho Plus Mattress. Introducing brand new technology for unparalleled orthopaedic support.
Top-rated!
Here at Mattress Online, we've given this mattress our own stamp of approval as it's one of our Top Picks for 2025! We're confident you'll love this mattress and everything it has to offer, so why not treat yourself today.
Sealy support
The unique PostureTech Core Support spring system has been researched by medical professionals. Unlike traditional pocket springs, Sealy PostureTech Support springs get firmer under pressure. Providing tailored support for your whole body. Each spring can move to give responsive support focussing on the heaviest parts of your body. These springs are twice tempered which is the process of unique heat treatment that strengthens and enhances the spring structure. Adding incredible durablity and stability to the mattress.
Ortho packed
Zoned into three sections, the middle third of the mattress contains Sealy PowerPack technology. Denser springs within this zone provide added lumbar support for orthopaedic relief.
On the edge
Sleep or sit right on the edge of your new mattress, with no sag or roll off. The super sturdy reinforced sprung edge prevents that feeling of having a wall at the edge of your mattress. Instead, it cradles your weight for ultimate pressure relief.
A fresh look
The ultra comfortable mattress top is hand tufted for the perfect firmer feel. Finished with a striking modern damask cover for that plush touch. The mesh vented sides allow for enhanced breathability, helping your mattress stay clean and cool for longer.
Made to last
This mattress is double sided and can be flipped every few months to maximise comfort and longevity. The four vertical handles along the mattress edge make it easy to lift and manoeuvre with two people.
100% Recyclable
All Sealy Ortho mattresses are 100% recyclable at the end of their use, with no components going to landfill. Buy in confidence with the 5 Year manufacturer Guarantee.
Weights: Single: 22kg, Small Double: 29kg, Double: 33kg, King Size: 38kg, Superking: 45kg, Superking Zip and Link: 46kg
This mattress comes with a free 60-night comfort trial - like all of our mattresses!
The trial allows you to test your mattress for 60 nights, and if you don't like it, you can swap it!
It can take some time to get used to a new mattress, which is why we ask you to sleep on your mattress for 30 nights. If you don't like the feel of your mattress after 30 nights, simply get in touch! We'll be happy to swap it for you.
| Firmness | Extra firm |
| Comfort fillings | Soft White Fibres |
| Support system | PostureTech Core Support Springs |
| Back care | Orthopaedic support |
| Edge support | Yes |
| Cover | Damask cover |
| Turning handles | Yes |
| Double-sided | Yes |
| Guarantee | 5 years |
| Awards & accreditations | Handcrafted in the UK, Approved by the National Bed Federation |
| Fire resistance | Conforms to BS7177: 2008, for use at home |
| Downloads | Sealy Product Care and Guarantee |
| Size | Width | Length | Depth |
|---|---|---|---|
| Single | 90cm | 190cm | 29cm |
| Small Double | 120cm | 190cm | 29cm |
| Double | 135cm | 190cm | 29cm |
| King Size | 150cm | 200cm | 29cm |
| Superking | 180cm | 200cm | 29cm |
| Superking Zip and Link | 180cm | 200cm | 29cm |
Please allow for a tolerance of +/- 2cm
The following delivery methods apply to mainland England and most of Scotland, Wales and Northern Ireland. Please read our delivery page for more information.
Next day delivery (weekdays only) Order before | FREE |
Weekday of your choice Order up to 60 days ahead | FREE |
Weekend On Saturday or Sunday of your choice | £17.50 |
Delivery to the front door of your building Free upgrade for Small Double, Double, King Size, Superking and Superking Zip and Link to your room of choice | Yes |
Two-hour delivery time slot We’ll let you know on the day before your delivery | Yes |
Call to let you know we’re on our way On your delivery day | Yes |
Delivery to your room of choice Free upgrade for Small Double, Double, King Size, Superking and Superking Zip and Link | £20.00 |
Mattress recycling We'll take away your old mattress | £35.00 |
Delivery is on an all-day service, 7am - 8pm for mainland England and most of Scotland, Wales and Northern Ireland.
Need further information? Please visit our Delivery page.
A balanced snapshot of what customers love (and what they don't), generated by AI.
Extra firm, very supportive in good quality
Verified Purchase
Great mattress, lovely and firm.
Verified Purchase
Probably not so good after bending round the handrail on the landing and then bending on the door frame at the same time dragging up the wall on the stairs.
Verified Purchase
Reply from MattressOnline.co.uk, 1 month ago
Hi Robert I am sorry that you experienced this level of service from our delivery partners and we appreciate you bringing this to our attention. This is not the level of service we have come to expect from our delivery partners; I will raise this as a complaint with AIT, in order to prevent this type of issue from happening again in the future. Sorry again for any disappointment caused. Kind regards Charlie
good for value
Verified Purchase
Nice nice nice
Verified Purchase
Really comfortable, sleep better without so much back pain now
Verified Purchase
The mattress is really good which can fully support my backbone to having a lovely sleep over the night.
Verified Purchase
Very satisfied with the mattress! Quick delivery service! delivery with 2 staff!
Verified Purchase
It fitted the description exactly.
Verified Purchase
A very comfortable mattress. Thank you.
Verified Purchase
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