Each year, we get hundreds of bed shoppers asking, “what is the best mattress for my back?”.
Back pain is one of the most common health problems faced by Australians. It is a complex and costly issue that affects millions of Aussies every year.
Choosing a mattress that supports the spine correctly is a huge part of maintaining a healthy spine.
So what is the best mattress when it comes to back care? In 2025, our review team gave the nod to the Silent Night Onyx Mattress as Australia’s ‘Best Back Care’ Mattress.
Silent Night Onyx – 2025 Best Back Care Mattress
The Silent Night Onyx is Australian made and is a true leader in the retail mattress market. It immediately gives out a strong sense of refinement and aesthetic appeal. Even before lying on it, this mattress has a distinct presence and gives out a modern, edgy vibe.
To see this mattress in ‘real life’, here is our video review:
Mattress construction
The top comfort layer of this mattress is highly sophisticated and is a strong indicator of its level of craftsmanship.
This comfort layer contains an exclusive ‘ICE-TEK’ cooling knit which is a revolutionary, thermo-regulating material. It instantly removes heat from your body, helping to maintain a cool, comfortable sleep temperature. In addition, the top layer contains a premium silk cashmere blend which produces a strong yet luxurious feel.
The top cover of the Silent Night Onyx sits over a combination of premium comfort foam and memory foam which offers exceptional comfort and pressure relief. Comfort Sleep have also added a special ‘open cell layer’ to further assist with ventilation and airflow.
Our review team gave the nod to the Silent Night Onyx Mattress as Australia’s ‘Best Back Care’ Mattress.
The Silent Night Onyx possesses an outstanding pocket spring system, namely its 10 Zone Silentpocket™ Dual Coil System. This spring unit contains a high spring count with approximately 1,740 springs (queen size). As you would expect, it offers excellent spinal support and minimal partner disturbance. It can accommodate people of all sizes with little fuss.
All firmness versions of the Silent Night Onyx respond well to normal sleep movements, and we rated its level of responsiveness as ‘optimal’. In basic terms, this means that changing sleep positions (and intimate activities) shouldn’t be any trouble.
Please note that our responsiveness scales are just a guide and preferred responsiveness levels will vary between individuals. It’s worth noting also that innerspring mattresses are generally more responsive than foam mattresses.
Firmness options
The Silent Night Onyx comes in a firm, medium, and plush version. You can see our specific firmness ratings in each review.
It is rather ‘firm’ range overall, with the plush version not as soft as some other plush options. If you are after a softer mattress range the Neoluxe Vantage Silver would be the perfect alternative.
The firm version should suit most back sleepers, whereas the medium and plush versions should suit all sleeping positions. Understandably though, this suitability will vary between individuals.
The finer details
The Silent Night Onyx has excellent edge support, thanks to its Edge Boost™ Foam Boxed Wall – an ultra firm, highly resilient foam box encasement which provides the most robust of mattress perimeters.
Along with its exceptional back support, this mattress has an exceptional ability to maintain a cool sleep temperature. This is relevant for many Australians who have difficulty with ‘sleeping hot’ at night. The Silent Night Onyx is also well-certified as non-toxic and eco-friendly, holding the GECA (Good Environmental Choice Australia) certification.
The Silent Night Onyx offers incredible value considering the high quality construction and its delightful balance of comfort and support. The mattress comes with a 10 year warranty, and we would definitely recommend it for those who struggle with sleep temperature during sleep.
The Silent Night Onyx comes with a 100 Night Eco Exchange (and return/refund option). This means that you can exchange your mattress for another Silent Night Onyx of a different firmness, if you are not satisfied.
For full details, please see our 100 Night Eco Exchange section further down.
What bed base should I use?
As with most mattresses, we recommend the Silent Night Onyx to be used with a solid bed frame (such as the Sleep Republic Pro Base), or a solid ensemble base (with the slats no longer than 8 cm apart).
A bed frame (with flexible slats) may still be adequate, but again, we strongly recommend that the distance between each slat is less than 8 cm. Use of an unsupportive mattress foundation will usually void the mattress warranty.
Furthermore, we do not recommend the Silent Night Onyx to be used with an adjustable (electric) bed base as this will also void the warranty. Here is our full list of mattresses that are compatible with an adjustable bed base.
It’s worth noting here that mattress firmness, performance, and durability will vary with different bed bases.
Available sizes
The Silent Night Onyx is available in all 7 mattress sizes (super king, king, queen, double, king single, long single, and single) so it will accomodate all adult sleeping situations.
Here are Australia’s standard bed (mattress) sizes in 2025.
Summary
The Silent Night Onyx is an outstanding mattress that was awarded Australia’s ‘Best Back Care’ Mattress in 2025. It contains a cool and comfortable top layer, along with a spring system of the highest quality.
To see our full review of the Silent Night Onyx, click here.
If you have any questions about this mattress, leave a comment below or don’t hesitate to contact us!
*Mention ‘Bedbuyer’ at any Beds n Dreams store OR click SHOP NOW and use the Bedbuyer discount code (provided in our review) at checkout to get the best price. Delivery cost will vary depending on your location.
Back pain can be complex with many factors involved. These factors include (but are not limited to) a person’s age, general health, type of mattress, type of pillow, occupation, spinal condition/s, strength, flexibility, and previous injury. As such, it can be difficult to predict how each person will respond to a specific mattress in terms of back pain relief. As such, we cannot guarantee that any specific mattress will help with back pain. If you would like to discuss additional solutions for your back pain, please comment below.
In a nutshell 🥜
- Australia’s ‘Best Back Care’ Mattress in 2025
- Excellent spinal support
- Australian made
- 100 night trial period
- 10 year warranty
Retail Prices
100 Night Eco Exchange and Trial Period
If you are not satisfied with your Silent Night Onyx, you can exchange your mattress for a different firmness within the 100 night period (Eco Exchange).
Once the Eco Exchange has been activated, the customer can also return the mattress for a refund (if still not satisfied).
Details of the Eco Exchange:
(i) The 100 Night Eco Exchange is an exclusive offer for Bedbuyer online metro customers only (and is not offered to any in-store customers).
(ii) The 100 Night Eco Exchange is only applicable to the Silent Night Onyx, Neoluxe Vantage Silver, and Hypnos Balmoral.
(iii) Eco exchanges can only be activated within the same product range. For example, you cannot exchange a Silent Night Onyx for a Neoluxe Vantage Silver.
(iv) A customer must sleep on the mattress for a minimum of 30 nights from the time of pick up or delivery (to allow for the body to adjust to the new mattress).
(v) A mattress that is damaged or soiled in any way will be exempt from the 100 Night Eco Exchange. Normal wear and tear is accepted.
(vi) The Eco Exchange applies to mattresses of the same size.
(vii) The Eco Exchange is valid for one mattress per household/address.
(viii) If a customer activates an Eco Exchange and is still not satisfied, they can request a full refund within the 100 night trial period (no questions asked). The refund will be reduced by a $150 transport fee.
ix) To quality as a Bedbuyer customer (and be eligible for a 100 Night Eco Exchange) you must click SHOP NOW and use the current Bedbuyer discount code at checkout.
Bedbuyer is Australia’s largest bedding website and leading independent mattress review group. To read our disclosure and disclaimer statement, click here.