Do you use an "H" harness with your booster?

[Miss.September]

They can't go into a lap sash belt until they are 4. (Disclaimer - I can't find out where I got this info from, and the rules change so often).

While they still fit, safest to keep them in the 5 point harness.

I agree.

We have DD1 still in her car seat with the harness, hasn't been changed to a booster. She's on average for height and weight for her age (5). It still sits properly on her. We had her in a booster with the normal seatbelt while we were away recently and the seatbelt didn't fit properly. Cut across her neck terribly. If the VicRoads thing is a recommendation, I reckon it will be a case by case scenario depending on the size of your child.

[wysiwyg]

I think I have actually confused myself and possibly others following the thread - so I am just reposting the whole bit from VicRoads - the crucial bit I had missed first time about it only being about the non in-built harnesses

A child safety harness is NOT an inbuilt harness: it is an additional product to purchase.

A child safety harness is attached to a child restraint anchorage point and is sometimes used with a booster seat or lap-only seatbelt.

Are child safety harnesses recommended?
No. A child safety harness is difficult to use and fit correctly and is commonly misused. Incorrect use of the child safety harness can cause the seatbelt to ride up into the child's stomach area, which may cause injury or death to a child in a crash.

Do not use a child safety harness where a lap-sash seatbelt is available. Research recommends using a child safety harness only in situations where it is not possible to replace your lap-only seatbelt with a lap-sash seatbelt.

If you are not able to replace your lap-only seatbelt with a lap-sash seatbelt you will need to use a child safety harness with a booster seat. In this case, it is recommended to use a booster seat with an anti-submarining feature to hold the lap part of the seatbelt down low on the child’s hips. Examples of anti-submarining features are displayed below.


If you must use a child safety harness, ensure that the shoulder straps are not too tight and that the lap part of the seatbelt is very low across the thighs, otherwise it may ride up into the child’s stomach area. This may cause serious injury or death to a child in a crash.

The harness must be checked for correct fit every time it is used.

[~TT40~]

There are 5 things to look at to see if your child is big enough to fit in a lap slash, irregardless of age etc.. (Good things to look for when going from a 5pt harness to lap slash in a booster, or to moving out of a booster.)
They are:
1. Lap part actually sits on their lap
2. Slash bit goes across their torso and shoulder (doesn't cut into their neck)
3. Their knees reach the edge of the seat, so they bed naturally
4. Their back is against the vehicle seat.
5. They will sit still and remain in the seatbelt for the trip (not get out)

If they don't pass, keep them in a 5 point harness

[feeb]

I changed DS2 to booster as he was over 18kg and the maxirider said over 18kg could no longer use 5 point harnesss.