[RacinNinja]

Originally Posted by Motofool

One that protects your eyes, face, shin and skull from insects, gravel, rain wind, noise and mechanical impacts.

The inner surface should perfectly fit the size and shape of your skull.

It should be rated by DOT or/and SNELL and it should be comfortable and quiet enough for you to want to wear it for all rides, short or long.

Please read these:
https://www.ninjette.org/forums/showthread.php?p=913880

https://www.ninjette.org/forums/showthread.php?t=207260

Don't forget ECE ratings too......