Britax Safe-N-Sound · High-back booster

Britax Safe-N-Sound Hi-Liner SG

Based on 1 independent scored test: Child Car Seat Safety Ratings (Child Restraint Evaluation Program, CREP) (2023). The test scores average 78. With only 1 test, the ranking score is pulled down a little until more testers confirm it.

Tested for Australia & NZ ★ Editors' pick

Shortlist score

Good

#22 of car seats for Australia & NZ

Single test

Where to buy

This seat is certified for Australia & NZ. Car seats may only be used in the market they're approved for, so we don't link to shops in Czechia.

Test results

Each score as the tester published it, converted to our 0–100 scale. Weight is how much the result counts towards the score.

Child Car Seat Safety Ratings (Child Restraint Evaluation Program, CREP) AU · Government / institute

CREP rating, 2021-onward protocol, 2023 · BS4830A-020132

3.9/5★

Our scale78

weight 0.90

Ease of use: 3.2
Protection points: 74.34/100
Ease of use points: 64.64/100

Listed at A$229 Rated modes: booster E (4-8 y). score_raw/ease_of_use are for the first-use mode (booster E (4-8 y)); other modes in subscores. Rating added Aug 2023.

View on childcarseats.com.au ↗

CHOICE AU · Consumer organisation

CHOICE car seat buying guide (Jan 2026), best picks from CREP ratings, 2023

CHOICE: Best booster seats

Pick or pass/fail. Shown, not scored.

Crep protection stars: 3.9

★ Editors' pick CHOICE does not test car seats itself; it lists CREP protection rating 3.9/5 (year tested 2023) for this pick. Same rating appears under source crep.

View on choice.com.au ↗

Also recommended: CHOICE: CHOICE: Best booster seats.

Top-ranked alternatives

78

Mother's Choice Trinity
CREP 4.8/5★
77

Britax Safe-N-Sound Express
CREP 4.6/5★
75

Britax Safe-N-Sound Tourer
CREP 4.1/5★★ CHOICE CHOICE: Best booster seats
75

Joie Trillo
CREP 4.1/5★
74

Hipod Boston Pro
CREP 4.6/5★

How we turn these into one number: methodology. Tested in 2023.