Choosing a child restraint is about more than finding a seat that looks good in the car. Parents need something that fits their vehicle, supports their child as they grow and makes everyday travel easier.
That combination is exactly why the InfaSecure Quattro Onyx has become one of the most popular choices for Australian families.
Designed for children from newborn to approximately four years of age, Quattro Onyx combines a compact 42 cm footprint with practical features, premium comfort and protective technology developed for real Australian family life.
A compact car seat made for real cars
One of the biggest challenges parents face is finding a child restraint that fits comfortably inside their vehicle, particularly when they have a smaller car or need to install multiple seats across the back row.
At just 42 cm wide, Quattro Onyx has been designed to make better use of limited back-seat space. Its narrow shell can make it a practical option for smaller vehicles and three-across arrangements, while its compact rearward-facing depth helps preserve more room for the driver or front passenger.
Every vehicle and child-restraint combination is different. Families should always check compatibility, follow the instruction manual and consider having the installation assessed by a professional child-restraint fitter.
Suitable from newborn to approximately four years
Quattro Onyx is a 0-4 convertible car seat designed to support children through several important stages.
It can be used rearward facing from newborn to approximately 30 months, before transitioning to forward facing with the in-built harness from around 12 months to approximately four years, subject to the child meeting the relevant height markers.
This long period of use gives families one practical seat for the early years, rather than needing to replace it as soon as their baby reaches toddlerhood.
Protective technology in a slim design
A compact seat should still deliver the features families expect from a premium child restraint.
Quattro Onyx combines Air Cocoon Technology™ with Secur-air™ to help manage crash energy and provide additional cushioning around the child. It also includes a built-in anti-rebound design to enhance stability when used in rearward-facing mode.
These technologies are integrated into the restraint, helping Quattro Onyx maintain its slim profile without losing the practical features families rely on every day.
Designed to make everyday adjustments easier
Car seats are used constantly, so small usability features can make a noticeable difference to parents. The Twist & Lift™ system allows the headrest and harness to be adjusted together using one hand, helping parents update the fit as their child grows without manually rethreading the harness.
- Built-in ISOFix connectors for compatible vehicles
- Nine recline positions to support fit and comfort
- A quick-access seatbelt path
- Press-stud covers and harness pads that remove easily for cleaning
- Included infant inserts, shoulder pads and comfort accessories
Together, these features are intended to make installation, adjustment and cleaning more manageable through everyday family life.
Breathable comfort for everyday travel
Quattro Onyx is finished in premium Active Bamboo™ fabric, designed to provide breathable, moisture-wicking and antimicrobial comfort.
The fabric helps keep children feeling comfortable during school runs, longer road trips and warm Australian days. Removable press-stud covers also make it easier to handle the crumbs, spills and messy moments that come with travelling with children.
Why do Australian families choose Quattro Onyx?
Quattro Onyx answers several of the questions parents commonly ask when choosing a car seat:
Will it fit in my car? Its 42 cm width and compact rearward-facing depth make it a practical option for many smaller vehicles and multi-seat arrangements.
Will it last beyond the newborn stage? It is designed for use from newborn to approximately four years, subject to the child meeting the relevant height markers.
Can my child remain rearward facing for longer? Quattro Onyx supports extended rearward facing to approximately 30 months.
Is it practical to use every day? ISOFix compatibility, one-handed harness adjustment, removable covers and nine recline positions help simplify regular use.
Will my child be comfortable? Active Bamboo™ covers and included inserts provide breathable support across different stages.
Designed by an Australian family-owned company
InfaSecure is an Australian family-owned company with more than 70 years of experience designing child restraints for Australian families and vehicles.
Quattro Onyx reflects the way we approach every product: thoughtful innovation, everyday practicality and design made for real family life. They are also the seats we choose for our own children, because protecting families has always been personal to us.
For parents looking for a compact newborn-to-four-years car seat, particularly those working with limited back-seat space, Quattro Onyx offers a practical balance of fit, comfort, adjustment and protective technology.
Explore Quattro Onyx
Find out whether it is the right fit for your child, your car and your family.
Frequently asked questions
Is the InfaSecure Quattro Onyx suitable for newborns?
Yes. Quattro Onyx is suitable from newborn to approximately four years, subject to the child meeting the restraint’s height-marker requirements.
How wide is the Quattro Onyx?
Quattro Onyx is approximately 42 cm wide, giving it a compact footprint for smaller vehicles and families needing multiple child restraints.
Can three Quattro car seats fit across a back seat?
Its narrow design can make three-across installations possible in many vehicles. Fit depends on the vehicle, seating positions and the other restraints being installed, so always test the complete configuration before purchase.
Does Quattro Onyx have ISOFix?
Yes. Quattro Onyx includes built-in ISOFix connectors and can also be installed using the options outlined in the product instruction manual.
How long can a child remain rearward facing in Quattro Onyx?
The seat supports extended rearward facing from newborn to approximately 30 months, depending on when the child reaches the relevant height marker.
Is Quattro Onyx a good option for smaller cars?
Its 42 cm width and compact rearward-facing depth make it a practical option for many smaller cars, although vehicle compatibility should always be confirmed before purchase.
What fabric is used on Quattro Onyx?
Quattro Onyx uses Active Bamboo™ fabric, designed to be breathable, moisture-wicking and antimicrobial for everyday comfort.
