4.
Retention Check
Now fasten the chin strap,
so you can check it. After the strap has been tightly fastened, hold your
head steady, and note that this test may be a little uncomfortable, but
that it is very important. Reach over the top of the helmet, grabbing the
bottom edge with your fingers. Then try to roll the helmet off your head.
If it comes off, it is undoubtedly too large.
NOTE:
Do not use a helmet that can be rolled off the head with the strap
fastened! Try not to cause severe pain, but do give a good, strong pull
on the helmet. THIS TEST IS VERY IMPORTANT.
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