The Ledge MIPS helmet features a clean, minimalist skate-style design with Hard Shell Construction built for street and park riding. Under-the-hood muscle meets modern technology including MIPS, a removable Auto Loc 2 Fit System and ample venting. . . . MPS- Multi-directional Impact Protection System. . Hard shell construction. . Auto Loc 2 Fit System. . On-The-Fly vertical tuning. . Super cool vents. . Stack ventilation. . Removable goggle retainer. . Removable earpads. . Compatible with aftermarket Giro audio systems by Outdoor Tech. . Seamless compatibility with all Giro goggles. . Compliance: CE EN1077. .