child restraint

US /ˈtʃaɪld rɪˈstreɪnt/
UK /ˈtʃaɪld rɪˈstreɪnt/
"child restraint" picture
1.

a safety device (such as a car seat) designed to protect a child in a vehicle

:
Always use a proper child restraint when traveling with young children.
The new car comes with advanced child restraint systems.