The Isode II MIPS brings the famous styling and venting of Giro's highest-end road helmets into this lightweight sport road helmet. With a compact shape, light weight, and efficient ventilation, the Isode II MIPS clearly references Giro helmets ridden by pros, but with a beginning user-friendly fit system that provides 7cm of dial adjustability. Add in Mips(R) Evolve Core for additional protection in certain impacts, and the Isode II MIPS is a best-in-class sport road helmet. Features: Designed for sport and road biking MIPS(R) Evolve Core reduces rotational forces while enhancing fit and comfort by combining the MIPS slip plane with the helmet's adjustable fit system In-mold construction fuses a tough polycarbonate outer shell with an impact-absorbing foam liner Roc Loc(R) Sport fit system allows you to adjust the size with one hand and has a 7cm adjustment range with a clicking sound for a comfortable fit Deep internal channeling combined with 16 vents offers optimal airflow and comfort Removable visor lets you customize your coverage Reflective rear decals for added visibility Complies with U.S. CPSC Safety Standard for Bicycle Helmets for persons age 5 and older Universal adult size fits 54-61cm