The sun shades work well for privacy if the interior is darker than the outside. Once it gets dark outside or you turn on interior lights you can see thru them. Some examples below. If in this case the side windows are covered with the same type of screen or the roll down side window shades are closed the sun shade acts as a one way mirror. Once you have covered all the windows you can see out and they can't see in.
If you leave the side windows uncovered as you can see in the photo the window shade appears slightly transparent.
We chose ours with the mountain lion print.
2014 FR330 DS