BonesDT;51036 wrote: It's not the hard fiberglass shell you need to worry about, it's the styrofoam cushioning inside.
Styrofoam in a helmet acts just like an auto's suspension; however, it doesn't return back to it's original position; it stays smooshed.
If you dropped your helmet without your head in it, then it should be fine, the styrofoam did not compress. When your head is inside and something stops the momentum of your helmet, your head keeps going and compresses the styrofoam, which gradually slows your head to a stop. The helmet is no good anymore. If you ever get hit in that same spot again, there is no fluffy styrofoam to cushion you, just rock hard compressed styrofoam.
Passing NESBA helmet tech means nothing. It just means your shell isn't cracked, which hopefully you know better than to get that far. Neither NESBA nor anyone can see the status of the styrofoam. That's why you should never use a used helmet or share it without supervision. The only way to know how good a helmet is, is to fully know it's history.