Giro LEDGE MIPS Snow Helmet Construction - hard shell construction, MIPS Fit system - auto loc 2 fit system - removable, on-the-fly vertical tuning Ventilation - super cool vents, stack ventilation Compliance - CE EN1077 Features - removable goggle retainer, removable ear pads, compatible with aftermarket Giro audio systems, seamless Compatibility with Giro goggles