Super-ventilated: ACE II utilizes the Venturi Effect via an air channeling system that pulls in cool air in from the top and pushes heat out through the rear exhaust system, perfect for any length group ride or sportive year round.
Aerodynamic Advantage: Droplet shape offers extremely low aerodynamic drag regardless of rider position.
Comfort: Removable internal padding was designed for easy maintenance and enhanced fit for both men and women.
Ultralight and Strong: Low and high speed impact-tuned EPS construction and toughened polycarbonate shell.(Complies with CPSC Bike and CE.EN1078 safety standards)
Highly Adjustable: Suitable For Head Circumference from 22 to 24.5 inches, BASE CAMP ACE II Helmet fits most standard adult sizes thanks the RTS Fit System.Please measure your circumference above eye brows with a tape measure or string to get your head size and make the right purchase.