You'll feel comfortable, confident, and look great wearing the Giro(R) Women's Verce(TM) Bike Helmet on the singletracks. The Roc Loc(R) Sport Fit system gives a custom and secure fit all with a simple turn of the dial knob. Plush padding, 18 vents, and a removable visor makes the Verce(TM) a premium helmet. FEATURES: Designed for mountain biking Trail-inspired design with deep coverage Roc Loc(R) Sport Fit system provides an adjustable, comfortable fit Ventilation: 18 vents In-mold polycarbonate shell with EPS foam liner for impact absorption Full Hardbody(TM) shell for maximum durability Features extra plush quick-dry padding for comfort Removable visor for coverage from the sun Reflective detailing for added visibility Complies with U.S. CPSC Safety Standard for Bicycle Helmets for persons age 5 and older SIZING: Universal Fit Size: 19.75" - 22.5" / 50 - 57cm