The Giro Atmos is crazy lightweight and features a Roll Cage internal reinforcement, that offers riders more safety at high flying speeds. It also features an in-mold polycarbonate shell with EPS liner that gives the helmet a unique design for air to flow through the helmet. This system along with the 26 wind tunnel vents allows the utmost ventilation for the rider. Features the Roc Loc 5 fit system so the rider can make sure the helmet fits properly. Other various riding uses include triathlon, MTB XC racing, and urban commuting.

• Roll Cage™ reinforcement provides an extra measure of strength and integrity that you'll never notice (unless you need it).
• Featherweight webbing with Slimline buckle
• Highly adjustable and ultralight Roc Loc® 5 retention system ensures a perfectly dialed fit
• 26 Wind Tunnel™ vents channel airflow for maximum cooling
• Small: 20"-21.75"/51-55cm
  Medium: 21.75"-23.25"/55-59cm
  Large: 23.25"-24.75"/59-63cm