Assertion: booster car seat | /r/CapableOf | provide adjustable headrests
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text: Booster car seats with 5-point harnesses provide easy-to-install options (such as the Clicktight options on the Britax models), side-impact protection, superb, comfortable materials, adjustable headrests, easy-to-wash materials, and all the other bells and whistles that you can expect from a crossover convertible car seat/booster seat option.