Xsm/Sm: 20.5-21.75in Med/Lg: 22-23.25in. XL/2XL: 23.75-25in.
– 19 vents provide cool air intake and heat exhaust
– Conehead™ technology
– Full rear head coverage
– Custom 7iDP liner for superior fit and comfort
– BOA one hand dial fit adjustment
– Rapid adjust chin strap
– Tested beyond CE, CPSC, AS standards