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Here's an article from 6 months ago about new helmet technology. http://www.foxnews.com/tech/2017/08/08/revolutionary-new-zero1-football-helmet-may-help-nfl-pl

• kbouck 9y ago
  > "The outermost layer deforms like a car bumper, yielding when it's hit and slowing impact forces." The helmets would need frequent changing, or else they might look like demolition derby cars by halftime.