Chin, forehead, and cheek vents combined with rear exhaust port provide maximum riding comfort.
Easy one-handed jaw operation allows for convenient on and off with glasses.
DOT approved.
For proper fit and size measure the circumference of your head 1" above your eyebrows and around the largest portion of the back of your head.
21 1/4" - 21 5/8"------- Small
22" - 22 1/2"----------- Medium
22 7/8" - 23 1/4"------- Large
23 5/8" - 24"----------- X-Large
24 1/2" - 24 7/8" ------ XX-Large