Beware of size S/M, it is really a size S.
Reviewed by dan from montana on Monday, March 17, 2014
This helmet sizing on sierra is mislabeled. It shows you are ordering a S/M with head circumference of 21-22.5 in. This might be right for the helmet shell but the liner you get is a small with and the box says the helmet is 21-21 7/8 in. head circumference. S/M is really a small. I like the helmet other than the sizing issues.
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