Do I need sunshade on tinted window? Newborn baby

[Nobhobs]

Googling and not seeing any official guidance really. I'm trying to find out what percent tint we have. You can't properly see through from the outside but I don't know if we still need a sunshade for the baby or not.

In an ideal world I’d like our rear windows tinted but we never get round to it. We do have the stick-on sunshades and I’d use those as a minimum, definitely. When we’ve been in cars without them and the sun’s particularly bright, we’ve known about it. It’s not very comfortable for young ones and they can’t/don’t avoid it as easily as older ones.