Highway 21 .357 Solid Half Helmet Matte Black MD

If it ain’t broke, then don’t fix it. The .357 by HIGHWAY 21 embodies simple style and function of the classic half helmet by focusing on strong durable materials mixed with a little HIGHWAY 21 flavor. A timeless design to serve day in and day out that will not spoil your seat time. Buy it, throw it on, log miles.

Highway 21 Helmet Sizing Chart

To find your approximate size use a soft tape measure. Start at your forehead approximately one inch above your eyebrows and across the largest portion of the back of your head. Cross reference this measurement on the helmet size chart to determine the approximate size.

Size	Inches
XS	20.5 - 21.25
SM	21.625 - 22
MD	22.4375 - 22.75
LG	23.125 - 23.625
XL	24 - 24.375
2X	24.75 - 25.1875
3X	25.5625 - 26
4X	26.375 - 26.75