Perhaps the inappropriate forum, but anything that protects the Ravens players' noggins is well worth a read IMHO! And as part of full disclosure, proud Hokie grad here.

"Tackles and their consequences on the body has been a focal point of [Va Tech Professor] Duma’s research for a decade as a professor of biomedical engineering and department head of the Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences. The results have brought media attention from around the world."

Read more at--
http://www.vt.edu/spotlight/achievem...tent=Read+more