BB Boom IZZA Notice D'utilisation page 35

Check and adjust the height of the shoulder straps and headrest to the correct
position according to your child's height.
5. Engage the buckle and put the two metal sections of the buckle connector
together. Slot the two buckle connectors into the slot in the buckle until they "click"
in place.
Check that the harness has not become twisted and also check that the cover
is not impeding the movement or fit of the harness in any way.
6. Pull down the adjustment strap and adjust it to the proper length to make sure
your child is snugly secured.
15