Bok
05-17-2012, 02:13 AM
Gel-filled liner absorbs energy of impacts, may reduce sports-related head injuries
More... (http://www.sciencenews.org/view/generic/id/340723/title/FOR_KIDS_Helmet_helper)
More... (http://www.sciencenews.org/view/generic/id/340723/title/FOR_KIDS_Helmet_helper)