britax hi-liner booste seat

Summary – Britax Hi Liner

NOT RECOMMENDED….. update 2016… The Britax Hiliner has not changed in many years and is a very wide booster seat, with the addition of the anti submarining clip. Britax have released the Kid Guard which is a Booster seat without the armrests allowing easier access to the seat belt buckle. Similarly Infa Secure have the vario which offers more protection (due to the ACT) than the Hiliner and it is narrower than the Hiliner.

Britax Hi Liner Booster Seat Review


The headrest holds your child’s head upright when he falls asleep. It is easy to use with the car seat belt and it doesn’t take up too much room when you have a small car and in some it will allow 3 across, Anti-submarine clip is a great safety bonus.


The padding on the bottom of the seat is a little thin.

The anti submarining clip (SLIDEGUARD Clip) is set at the maximum length. This is dangerous when a parent does not adjust the length of the anti submarining clip for their child, this may cause the lap part of the seat belt to sit higher under a child’s ribs. Additionally when a parent does not use the anti submarining part of the seat then they are compromising the safety of their child without knowing it.
Other car seat manufacturers have the anti submarining designed into the seat by having the back of the seat sitting lower creating a bucket seat type of child restraint to prevent submarining of the child inherently in the design.

Summary Safe n Sound Hi Liner Booster seat:

Great for if you have limited space in the back seat, looks good and is versatile for the growing child. however the need to use the anti submarining clip relies upon parents to check that the child has passed the lap part of the belt through the clip.

Hi Liner Booster Seat Description

The Hi-Liner SG Booster seat from Safe n Sound includes features such as

  • exclusive Safe-n-Sound SLIDEGUARD Clip
  • arm rests and retractable cup holders
  • Deep side wings to contain your child’s head and body
  • one hand adjustable headrest

The SLIDEGUARD Clip is a life saving device that prevents your child from sliding under the lap-belt (submarining) during impact, thus minimising the risk of abdominal injury.

Hi-Liner SG is the first Expandable Booster Seat designed with slots in the seat cover and shell. This child booster seat is compatible with Safe-n-Sound Protecta Harness, however with the release of the Gtype seat i would recommend going for a INFA evolve which will keep your child harness until they are 8 years of age.

Deep side wings contain your child’s head and body, and in the event of a crash they sheild your child from impacting with the vehicle door. The EPS foam liner provides additional protection and in the event of a crash absorbs energy, protecting your child’s head

The one hand adjustable headrest is simple to change height to comfortably fit child

The red colour coded seat belt guides indicate the path and positioning of seat belt for ease of use. Includes arm rests and retractable cup holders