The Isode(TM) Mips(R) II features a compact shape, light weight, and efficient ventilation combined with a beginning user-friendly fit system that provides 7cm of dial adjustability. With the added rotational energy management of Mips(R) Evolve Core, the Isode II Mips is a best-in-class sport road helmet. Fit & Design: Roc LOC(R) Sport Fit System: The Roc Loc Sport fit system offers easy one-handed operation with a 7cm adjustment range Its confident clicking feel and sound lets riders know that the helmet is adjusting to a comfortable fit With comfort similar to Roc Loc 5 and ponytail compatibility; the new Roc Loc Sport fit system brings premium function to sport level helmets In-Mold Construction: In-Mold Construction fuses a tough polycarbonate outer shell with the helmet's impact-absorbing foam liner The fusion process allows for better ventilation systems; making in-mold helmets lighter and cooler than traditional helmets Deep Internal Channeling: Combined with the massive vents; internal channeling forces air to flow over the scalp; providing remarkable cooling power Quick link removable visor Technology: Mips(R) Evolve Core: All Giro helmets are designed to reduce as much energy as possible while meeting and exceeding stringent safety standards Giro's Mips(R) Evolve Core-equipped helmets is to reduce rotational forces while enhancing fit and comfort by combining the Mips slip plane with the helmet's adjustable fit system This technology can reduce the amount of rotational force that may be transferred to rider's brain in certain impacts