FEATURES: Great for all types of rides Ventilation: 22 vents In-mold polycarbonate shell with EPS foam liner for impact absorption Full coverage shell for durability Removable snap-fit visor with reinforced anchors protect your eyes Reflective detailing for added visibility Complies with U.S. CPSC Safety Standard for Bicycle Helmets for persons age 5 and older TECHNOLOGY: Multi-Directional Impact Protection System reduces rotational forces from certain impacts and offers more protection Roc Loc(R) Sport Fit system provides an adjustable, comfortable fit SIZING: Universal Fit Size: 19.75 in. 22.5 in. / 50 cm 57 cm