But riders should keep in mind that a helmet will really only protect the outside of your head. The brain injury damage happens when your brain hits the inside of your skull when an impact occurs. It can surprisingly happen at slow speed. The force of the impact will cause it to happen and that helmet will do little to prevent your brain from hitting your skull.
So don’t be lulled into thinking you are safe w/a helmet and especially don’t take risks thinking your are protected.