Giro 2015/16 Range Winter Snow Helmet utilizes a 2-piece shell and integrated fit system to create an adaptive fit helmet durable yet semi-flexible construction wraps around the head to provide the lowest-profile fit MIPS Technology, Adjustable Venting, an integrated GoPro camera mount, and Fidlock Magnetic buckle Seamless Compatibility with All Giro Goggles/Compatible with Aftermarket Giro Audio Systems ASTM 2040-11 / CE EN1077