Giro crafts the Atmos with a whopping 26 vents and Wind Tunnel technology to pull cool air in and blow hot air out, a vital function for racing's extreme efforts. Then they make this lid super durable with Giro's Roll Cage and In-mold carbon-reinforcement technologies to protect your head when you need it most. Plus, they make sure the Atmos has a super fit with 3 sizes and their trusted Roc Loc 4 fit system.