Thanks for a very informative post! I once got hit in the leg by a box of tissues that became a flying object during a car accident. Cut/bruised me up pretty good, so I can only imagine what a shade could do!

I never used shades to protect from sunburn - I used them because sleepy babies fuss so much when the sun shines in their eyes. The shades never worked for me, though, because curious little ones start pulling on them and *pop*, down they come! :o) So whenever I had an emergency sun issue, I'd stop and tape a receiving blanket to the inside of the window, and continue on my merry way....