Families often arrive here asking for a product category: capsule, convertible, toddler seat, booster. Those shop-floor words overlap with the type letters used in AS/NZS 1754, but they are not a substitute for the label. This hub keeps the shop-floor language and points every claim back to the Standard and the state age bands.
## Rearward-facing infant restraints
These are the shells most people call capsules or infant carriers. In the legal table they cover birth until at least six months, and they remain the recommended orientation after that birthday while the child still fits. Many Australian convertibles also start life rearward. A capsule that clicks onto a stroller is convenient; it is only lawful if the restraint itself carries the Australian mark and is installed on the vehicle path in the instructions.
## Convertible and multi-stage seats
A convertible is one shell that can be used rearward and later forward, sometimes into a booster mode. Convenience is the appeal. The risk is turning the seat at the first legal opportunity instead of at the last safe opportunity. Read rearward versus forward together with the turning guide. The mode you are using today must still match the child’s size and the belt path printed for that mode.
## Dedicated forward-facing harness seats
Some seats are sold only as forward-facing harness restraints. They are aimed at children who have finished the rearward stage. They still need a top tether in typical Australian installations, and they are outgrown by shoulder markers, not by a guess about “toddler size”.
## Boosters
A booster’s job is to lift the child so an adult lap-sash belt lies on the hips and mid-shoulder. It is not a harness seat. High-back boosters and some lower designs exist; what matters is whether the product is an approved booster under AS/NZS 1754 and whether the vehicle has a lap-sash belt. A lap-only belt is the wrong partner for most boosters. See the booster hub.
## What the type letters are for
AS/NZS 1754 uses type designations (commonly discussed as Type A rearward, Type B forward harness, Type E boosters, and combination types). CREP’s public FAQ notes that the 2024 edition of the Standard made further changes, including work intended to support longer rearward use. This site does not reprint the Standard. If you need the type letter for a compliance or import argument, buy the Standard from Standards Australia or ask the manufacturer to show the type on the label.
## What does not belong in the Australian lineup
Unapproved inflatable boosters, second-hand seats with no history, and restraints built only to UNECE or FMVSS marks are the usual problem set. Queensland and CREP both say overseas seats must not be used unless they comply with AS/NZS 1754. An ISOFIX badge from another market is not that compliance.
If you are comparing shapes, stay inside buying and CREP. If you are comparing legal stages, stay inside ages and stages. This page exists so those two conversations do not collapse into a product grid.
This page is general information for Australian readers. It is not safety advice, a product ranking, or a fitting service. Always read the restraint label and the manufacturer instructions, confirm the current rule with the road agency in the state or territory where you are driving, and have the finished install checked by an authorised fitter.
<!-- expanded -->
Capsules versus convertibles, without a winner
A capsule earns its keep when you need to move a sleeping infant from car to pram without unthreading a harness. It costs you a second purchase later and a base that must be installed as carefully as a seat. A convertible earns its keep when you want one shell to cover rearward and forward modes. It costs you the discipline not to turn the shell at the first legal opportunity. Both can be lawful. Neither is “the safest type” on this page.
Boosters versus harnesses at the same birthday
At four, the legal table shows two shapes. The shapes are not equals in public safety guidance. A harness still wraps the child’s shoulders. A booster borrows the adult belt. If the child still fits the harness markers, the type you want is still the harness type. If the child has passed those markers, the type you want is an approved booster — not a cushion from the house.
Narrow seats and three-across problems
Some Australian seats are sold with a narrower base because three restraints on a rear bench is a real family geometry. Width is a vehicle-fit fact, not a safety ranking. CREP’s public materials sometimes list dimensions so you can see whether a seat will physically fit. Use those numbers as carpentry, not as a trophy.
If you are replacing a type because you dislike the fabric, you are shopping, not graduating. Graduation is a marker event.
<!-- pass2 -->
A longer reading path from this hub
If you arrived here from search, stay long enough to open three other URLs: the ages and stages table, your state page, and either installation or buying depending on whether the seat already exists. That triangle — stage, jurisdiction, physical install or purchase — is the whole method of this site.
People bounce because they wanted a product name. Product names go stale, get recalled, and fail to fit a particular bench. Official sentences last longer. Transport for NSW, Transport Victoria, Queensland TMR, the other road agencies, CREP, Kidsafe and the ACCC already wrote the sentences that matter. Our job is to put them in an order a tired adult can follow, and to refuse the extra sentences that would make this domain look like a shop.
If you are choosing a seat, the order is mark, stage, vehicle, optional CREP, recall search, fitter. If you are using a seat, the order is book, mode, tether, harness, fitter. If you are travelling, the order is the state you will stand in, the vehicle you will actually occupy, and a plan that does not involve sharing a belt.
Stay on the page until you can say those orders out loud. Then leave and do the physical thing. A hub that only produces more tabs has failed.
Related reading sits at the bottom of the template on purpose. Use it. Internal links are how a rebuilt heritage domain keeps old backlinks honest.