This is a pretty common misconception. Info from Snell Foundation: http://www.smf.org/helmetfaq#aDroppedHelmet http://www.smf.org/helmetfaq#aDroppedHelmet Most

This is a pretty common misconception. Info from Snell Foundation: http://www.smf.org/helmetfaq#aDroppedHelmet http://www.smf.org/helmetfaq#aDroppedHelmet Most manufacturers also offer a free inspection service where you can ship them your helmet and they'll check on the internals/foam.