All of these booster seats have
wide shoulder belt guides to keep the belt from being pinched and introducing dangerous slack.
Some have removable backs, so that you can take advantage of the extra head support and
shoulder belt guides until they're ready for a backless seat.
To ensure more protection it comes with the
locking shoulder belt guides and built - in IsoFIX rigid LATCH connectors which are easy to install.
The high backs on this type of booster seat have room to include
a shoulder belt guide, which can provide a safer fit, and certainly makes adjusting the seatbelt easier for you.
Wide
shoulder belt guides will be helpful in booster mode, because the slit - type shoulder belt guides found on many older combination car seat models don't allow the shoulder belt to slide freely, possibly allowing dangerous slack in the seat belt.
It comes with
a shoulder belt guide.
Highback boosters have built - in
shoulder belt guides, and their additional structure often makes it easier for children transitioning out of harness - equipped restraints to sit properly.