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Extension Straps 300mmExtension Strap 300mm gives you the ability to add extra length to the anchor strap of your Maxi-Cosi Car Seat or capsule tether
$29.95
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REASONS TO BUY A MAXI-COSI BOOSTER SEAT IN AUSTRALIA
1. YOUR CHILD DESERVES GENUINE PROTECTION, WITH PATENTED AIR PROTECT®.
Protective technology advances quickly, and what was considered safe five or ten years ago may be completely superseded today. At Maxi-Cosi, we’re renowned globally for our innovative safety technology and features, including our globally patented Air Protect®. This first-in-class safety feature reduces the severity of side impact crash forces by absorbing and redirecting impact energy away from your child’s head. It also actively slows your child’s movement, ensuring a gentler, softer landing in the event of a collision.
2. AUSTRALIAN DESIGNED, ENGINEERED AND SAFETY TESTED.
We don’t hide our safety features—every Maxi-Cosi child booster seat combines world-class safety and innovative design, culminating in a safe, stylish, and comfortable seat for your child. All Maxi-Cosi booster seats are designed, engineered, and manufactured in Australia to the highest standards and rigorously tested for safety. We guarantee product quality completely and offer a lifetime warranty.
3. INTUITIVE AND EASY TO USE.
With machine-washable fabrics, easy installation, and intuitive, user-friendly features, ensuring your child’s safety and comfort on the road has never been easier. Our Australian designers and engineers spend countless hours refining our booster seats to ensure optimal usability and safety, making our seats comfortable for your little one and a breeze for you.
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50,000,000
Happy Parents
"Our little guy loves his new big boy car seat! We had to upgrade our toddler to a bigger seat and found this seat to be roomy and very comfortable for him."
Meagan, Sydney, NSW
"Fantastic Service and Product. Easy online ordering system, correct description of product, quick delivery, and good price for value of product. "
Kathryn, Melbourne, VIC
"My child has told me the seat is very comfortable, which is a win! I love the very adjustable headrest, it can be easily adjusted It was very easy to install"
Amanda, Perth, WA
FAQs
What is a booster seat?
A booster seat is a child safety seat designed to elevate the child to the correct height in the backseat. There are both harnessed and unharnessed booster seats: an unharnessed booster seat is suitable for children aged 4 to approximately 8, while a harnessed booster seat caters to a broader age range from 12 months to 8.
Our car seat experts are available online or via phone to answer specific questions about choosing the right booster seat for your child.
Our car seat experts are available online or via phone to answer specific questions about choosing the right booster seat for your child.
What is the difference between a booster seat and a car seat?
A car seat is typically convertible, suitable for newborns up to approximately 4 years of age. A fully harnessed booster seat is used for children from 6 months up to approximately 8 years of age.
Maxi-Cosi recommends keeping your baby rearward-facing for as long as possible (up to 30 months in a Maxi-Cosi convertible car seat).
A booster seat is used for children from 4 to approximately 8 years of age, and a lap sash seatbelt is used for them.
Maxi-Cosi recommends keeping your baby rearward-facing for as long as possible (up to 30 months in a Maxi-Cosi convertible car seat).
A booster seat is used for children from 4 to approximately 8 years of age, and a lap sash seatbelt is used for them.
When can a child stop using a booster seat?
A booster seat should be used until a child is 8 or until the uppermost height marker has been reached per the owner's manual instructions and local law.
How do I choose a booster seat, and what should I look for in a booster seat?
Price, safety, and comfort are key considerations, and compliance is important when choosing a kids' booster seat.
WARNING: Many booster seats available in Australia do not meet Australian standards. All Maxi-Cosi booster seats are Australian Standards compliant.
WARNING: Many booster seats available in Australia do not meet Australian standards. All Maxi-Cosi booster seats are Australian Standards compliant.
Should my child sit in the front or back seat?
Children aged 4 years old to under 7 years old can only sit in the front seat if all the back seats are taken by other passengers under 7 years old.
If your vehicle does not have a back seat (e.g. a ute) they can travel in the front seat if they are in a child restraint as long as the airbags are deactivated. Please check your vehicle manual for requirements.
If your vehicle does not have a back seat (e.g. a ute) they can travel in the front seat if they are in a child restraint as long as the airbags are deactivated. Please check your vehicle manual for requirements.
How do I use a forward-facing car seat?
Forward-facing car seats can be used for children aged 6 months to approximately 8 years old. Maxi-Cosi recommends that a forward-facing seat be used from 12 months of age. When using a forward-facing car seat, it must:
Be securely installed in the car seat with the adult seat belt.
Have its top tether strap attached to the vehicle anchor point.
Have an inbuilt harness adjusted to the needs of the child.
When adjusting the harness to your child, the straps must come from the slots above their shoulders. You will need to move them to a higher slot if they are more than 25mm below their shoulders. If you need further assistance, refer to your user manual or call our customer service team.
Once your child’s shoulders have reached the top height marker, you will need to move your child to a booster seat or conduct a 5-point test to see if they can sit in a car without a car seat.
When using a booster seat, it must:
Have its top tether strap attached to the vehicle anchor point.
Ensure your child meets the entry-level height markers.
When adjusting the harness to your child, the straps must come from the slots above their shoulders. You will need to move them to a higher slot if they are more than 25mm below their shoulders. If you need further assistance, refer to your user manual or call our customer service team.
Once your child’s shoulders have reached the top height marker, you will need to move your child to a booster seat or conduct a 5-point test to see if they can sit in a car without a car seat.
When using a booster seat, it must:
What safety features should I consider when choosing booster seats for children?
Booster seats are held in place by the child’s body and the vehicle's lap-sash seat belt. A child can be injured in a crash if the seat belt is not properly adjusted.
Check that the seat belt sash crosses your child's shoulder and does not touch their neck. The booster seat's sash guide can be adjusted to prevent this.
Booster seats, like our Rodi, have built-in lap-sash guides that will help you perfectly position the lap-sash on your child. The lap sash section of the seat belt should sit across your child’s hips and not on their abdomen.
When using a booster seat, it's important to remember to attach the top tether to your car anchor point.
Choose a booster seat with an expandable headrest so you can adjust the height of the booster seat as your child grows.
Check that the seat belt sash crosses your child's shoulder and does not touch their neck. The booster seat's sash guide can be adjusted to prevent this.
Booster seats, like our Rodi, have built-in lap-sash guides that will help you perfectly position the lap-sash on your child. The lap sash section of the seat belt should sit across your child’s hips and not on their abdomen.
When using a booster seat, it's important to remember to attach the top tether to your car anchor point.
Choose a booster seat with an expandable headrest so you can adjust the height of the booster seat as your child grows.
What are the legal booster seat requirements across Australia?
Booster seat laws vary by state, but all states require children aged 4 to under 7 years to use either a forward‑facing child restraint with harness, or a booster seat. After age 7, a booster seat or adult seatbelt must be used — ideally only when the child is at least 145 cm tall.
New South Wales (NSW)
Children must not use a booster seat before age 4. The NSW Government states that children under 7 must be in an approved child restraint.
Children 7 and older who are still too small for an adult seatbelt should stay in a booster or harnessed seat.
The recommended minimum height for moving to an adult seatbelt is 145 cm.
Victoria (VIC)
Children must not use a booster seat before age 4. VicRoads states that children 4 to under 7 must use a forward-facing seat with harness or a booster seat.
Children 7 to 16 must use either a booster seat or an adult seatbelt. The recommended minimum height for moving to an adult seatbelt is 145 cm.
Children under 4 must sit in the back seat unless the vehicle has only one row of seats.
Western Australia (WA), Queensland (QLD), South Australia (SA), Tasmania (TAS), Australian Capital Territory (ACT) and Northern Territory (NT)
Children must not use a booster seat before age 4.
From 4 to under 7 years, children must be in either a forward-facing seat with harness or an approved booster seat.
Always check the booster’s height markers. If your child hasn’t reached the top marker, keep them in the booster even after they turn 7.
New South Wales (NSW)
Children must not use a booster seat before age 4. The NSW Government states that children under 7 must be in an approved child restraint.
Children 7 and older who are still too small for an adult seatbelt should stay in a booster or harnessed seat.
The recommended minimum height for moving to an adult seatbelt is 145 cm.
Victoria (VIC)
Children must not use a booster seat before age 4. VicRoads states that children 4 to under 7 must use a forward-facing seat with harness or a booster seat.
Children 7 to 16 must use either a booster seat or an adult seatbelt. The recommended minimum height for moving to an adult seatbelt is 145 cm.
Children under 4 must sit in the back seat unless the vehicle has only one row of seats.
Western Australia (WA), Queensland (QLD), South Australia (SA), Tasmania (TAS), Australian Capital Territory (ACT) and Northern Territory (NT)
Children must not use a booster seat before age 4.
From 4 to under 7 years, children must be in either a forward-facing seat with harness or an approved booster seat.
Always check the booster’s height markers. If your child hasn’t reached the top marker, keep them in the booster even after they turn 7.
Where can I find official guidance for my state?
You can check your local road safety authority for the latest legal requirements and fitting advice:
NSW: NSW Government – Child car seats
Victoria: VicRoads – Seat belts & child restraints
Queensland: QLD Government – Child restraints
Western Australia: WA Government – Seat belts & child restraint FAQ
South Australia: SA My Licence – Seatbelts & child restraints
Tasmania: Transport Tasmania – Child restraints
Australian Capital Territory: ACT Government – Seatbelts and restraints
Northern Territory: NT Government – Child car seats
Why is the 145 cm height rule important even if my child is over 7 years old?
Adult seatbelts are designed for people who are at least 145 cm tall. If your child is shorter:
The lap belt can ride up over their stomach instead of sitting low on their hips.
The shoulder belt may sit against their neck instead of across their shoulder.
This poor fit can increase the risk of serious injury in a crash. That’s why safety experts recommend using a booster seat until your child reaches 145 cm or passes the “five-step test” for correct belt fit.
This poor fit can increase the risk of serious injury in a crash. That’s why safety experts recommend using a booster seat until your child reaches 145 cm or passes the “five-step test” for correct belt fit.
Can my child use a booster seat before they turn 4?
No — under Australian road rules, children must not use a booster seat before their 4th birthday, regardless of how tall they are.
Booster Seats Australian Parents Trust for Maximum Care and Comfort
Maxi-Cosi booster seats are a popular choice for growing Australian families. Before buying a booster seat, it’s important to understand that Australian standards for booster seats have changed significantly, with many older-style seats not compliant in the Australian market...