The Giro's Atlas II is a ruggegly designed helmet for riders who need a larger helmet size. The Atlas II universally fits head sizes from 57cm to 64cm or 22.25 inches to 25 inches. It features the patented Acu Dial fit system, In-Mold construction, 20 vents, versatile styling, Universal Fit technology and weighs on 12 ounces or 340 grams.
