Should I buy a mirror for a rear-facing car seat?

Yes—consider buying one if it helps you stay calmer and avoid turning around while driving, but treat it as a convenience item, not a safety essential.

If you buy one, choose a simple rear-facing car seat mirror that is shatterproof, straps tightly to a headrest, has no loose parts, and can be angled so you only glance briefly in your rearview mirror. Install it very securely and check your car seat manual and vehicle setup first.

I’d skip it if it tempts you to watch your baby while driving, if your vehicle has no suitable rear headrest for a tight install, or if the mirror would sit where it could become a projectile in a crash.