Safe N Sound Hi-Liner SG Grey Booster Seat
The Hi-Liner is a tall, moulded plastic booster with an adjustable head rest, and is attached to the vehicle by an upper tether strap. The Hi-Liner does an excellent job of guiding the seatbelt into the correct position. The high side-wings can be adjusted upwards as the child grows, to ensure maximum side impact protection. It features a slide guard clip, which helps prevent a child from sliding off the seat and guides the lap part of the belt across the hips. If the seat is used in a position that only has a lap seatbelt, then an approved child safety harness must be used. It’s important to check your booster seat is compatible with a harness. As children grow and develop, their height and weight changes considerably. For many 4 year olds, a forward-facing safety seat will still be the right size restraint for them. A booster seat should only be used once the child has outgrown their safety seat by reaching the maximum height for the seat. A booster is a restraint designed to elevate a child so they can wear a seatbelt correctly while providing side protection from both the vehicle and other passengers. Children travelling in a booster seat should continue using it until they’ve outgrown it, and once they have and can’t fit the adult seatbelt correctly, then you'll need to use a larger booster seat. This page also provides installations videos and fact sheets. A correctly fitted restraint is critical in keeping your child safe when travelling in your car. That’s why RAA offers expert advice on child restraints and a range of restraint checks and fitting services. RAA Members get a free fitting with every restraint purchased from RAA within the last 12 months. * For more details, contact the Safety Centre on 8202 4592. *Terms & conditions apply
The Hi-Liner is a tall, moulded plastic booster with an adjustable head rest, and is attached to the vehicle by an upper tether strap. The Hi-Liner does an excellent job of guiding the seatbelt into the correct position. The high side-wings can be adjusted upwards as the child grows, to ensure maximum side impact protection. It features a slide guard clip, which helps prevent a child from sliding off the seat and guides the lap part of the belt across the hips. If the seat is used in a position that only has a lap seatbelt, then an approved child safety harness must be used. It’s important to check your booster seat is compatible with a harness. As children grow and develop, their height and weight changes considerably. For many 4 year olds, a forward-facing safety seat will still be the right size restraint for them. A booster seat should only be used once the child has outgrown their safety seat by reaching the maximum height for the seat. A booster is a restraint designed to elevate a child so they can wear a seatbelt correctly while providing side protection from both the vehicle and other passengers. Children travelling in a booster seat should continue using it until they’ve outgrown it, and once they have and can’t fit the adult seatbelt correctly, then you'll need to use a larger booster seat. This page also provides installations videos and fact sheets. A correctly fitted restraint is critical in keeping your child safe when travelling in your car. That’s why RAA offers expert advice on child restraints and a range of restraint checks and fitting services. RAA Members get a free fitting with every restraint purchased from RAA within the last 12 months. * For more details, contact the Safety Centre on 8202 4592. *Terms & conditions apply
The Hi-Liner is a tall, moulded plastic booster with an adjustable head rest, and is attached to the vehicle by an upper tether strap. The Hi-Liner does an excellent job of guiding the seatbelt into the correct position. The high side-wings can be adjusted upwards as the child grows, to ensure maximum side impact protection. It features a slide guard clip, which helps prevent a child from sliding off the seat and guides the lap part of the belt across the hips. If the seat is used in a position that only has a lap seatbelt, then an approved child safety harness must be used. It’s important to check your booster seat is compatible with a harness. As children grow and develop, their height and weight changes considerably. For many 4 year olds, a forward-facing safety seat will still be the right size restraint for them. A booster seat should only be used once the child has outgrown their safety seat by reaching the maximum height for the seat. A booster is a restraint designed to elevate a child so they can wear a seatbelt correctly while providing side protection from both the vehicle and other passengers. Children travelling in a booster seat should continue using it until they’ve outgrown it, and once they have and can’t fit the adult seatbelt correctly, then you'll need to use a larger booster seat. This page also provides installations videos and fact sheets. A correctly fitted restraint is critical in keeping your child safe when travelling in your car. That’s why RAA offers expert advice on child restraints and a range of restraint checks and fitting services. RAA Members get a free fitting with every restraint purchased from RAA within the last 12 months. * For more details, contact the Safety Centre on 8202 4592. *Terms & conditions apply
The Hi-Liner is a tall, moulded plastic booster with an adjustable head rest, and is attached to the vehicle by an upper tether strap. The Hi-Liner does an excellent job of guiding the seatbelt into the correct position. The high side-wings can be adjusted upwards as the child grows, to ensure maximum side impact protection. It features a slide guard clip, which helps prevent a child from sliding off the seat and guides the lap part of the belt across the hips. If the seat is used in a position that only has a lap seatbelt, then an approved child safety harness must be used. It’s important to check your booster seat is compatible with a harness. As children grow and develop, their height and weight changes considerably. For many 4 year olds, a forward-facing safety seat will still be the right size restraint for them. A booster seat should only be used once the child has outgrown their safety seat by reaching the maximum height for the seat. A booster is a restraint designed to elevate a child so they can wear a seatbelt correctly while providing side protection from both the vehicle and other passengers. Children travelling in a booster seat should continue using it until they’ve outgrown it, and once they have and can’t fit the adult seatbelt correctly, then you'll need to use a larger booster seat. This page also provides installations videos and fact sheets. A correctly fitted restraint is critical in keeping your child safe when travelling in your car. That’s why RAA offers expert advice on child restraints and a range of restraint checks and fitting services. RAA Members get a free fitting with every restraint purchased from RAA within the last 12 months. * For more details, contact the Safety Centre on 8202 4592. *Terms & conditions apply
in 35 offers
The lowest price for Safe N Sound Hi-Liner SG Grey Booster Seat right now is $70.00 at Adelaide Baby Hire, compared across 19 retailers.
The all-time low was $50.00 on 30 May 2026 — today's price is 40% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 5 Oct 2026.
Last updated at 05/10/2026 02:50:35
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Free delivery
Britax Safe-n-Sound Hi-Liner SG Booster Seat - Ink Blue
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
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| Harness Type | Five-point harness |
| Safety Features | No additional side impact protection |
| Max Height Capacity | When the headrest is at its highest position and shoulders are above the upper height marker |
| Max Weight Capacity | Not applicable (based on height or age) |
| Min Height Capacity | When child's shoulders are in line with the lower shoulder height markers with the headrest at its lowest point |
Britax Safe N Sound Hi Liner SG2 Booster Seat 4 - 8 Years - fortnightly
Britax Safe N Sound Hi-Liner Booster - Hire 2 months
Free delivery
Britax Safe-n-Sound Hi-Liner SG Booster Seat - Ink Blue
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Safe n Sound Hi-liner Sg Car Safety
Delivery between 12–16 Oct $350
Britax Hi-Liner SG Booster | BabySafe Child Restraints Blue
Delivery $15
| Harness Type | Five-point harness |
| Safety Features | No additional side impact protection |
| Max Height Capacity | When the headrest is at its highest position and shoulders are above the upper height marker |
| Max Weight Capacity | Not applicable (based on height or age) |
| Min Height Capacity | When child's shoulders are in line with the lower shoulder height markers with the headrest at its lowest point |
