Inflatable seat belts provide great safety benefits to booster-age kids and adults, but not all carseats can be installed with them.
Installing a Carseat with Inflatable Seat Belts
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Installation
Lockoffs and Belt Tensioners for Easy Installation of Carseats
A lockoff locks your seat belt for you. There are a couple of types of lockoffs available on carseats. Belt tensioners use leverage to tighten the seat belt for you.