Hi there, so

How to choose a baby car seat:
Rule number one - give preference to models that have passed a crash test and have the necessary certificate.
Pay attention to car seats with ECE R 44/04 certificate, which is a confirmation of the European safety standard.
The car seat must be equipped with side protection - a special design that protects the child during a side impact. The larger the sidewall and headrest area, the better.
The car seat casing must be made of high quality materials: energy-absorbing plastic or aluminum frame and power frame. If the case is plastic, it must have damping capabilities due to air chambers and stiffeners.

Pay special attention to the certification of car seats by age and weight categories and follow the manufacturer's instructions for installing the device in the car. You can read more here - Best Car Seat Protectors Review (Oct. 2019) | Top-Mom.com