You'll see this high-tech lid on cycling greats in the Grand Tours, on local group rides and everywhere in-between. 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.
Small 20”-21.75” / 51-55 cm
Medium 21.75”-23.25” / 55-59 cm
Large 23.25”-24.75” / 59-63 cm