Giro Verona Sport Women's Helmet - Closeout - BLACK GREEN WHITE In-Mold polycarbonate technology Acu-Dial fit system can be adjusted with a single hand for a comfortable, secure fit 22 vents provide airflow to keep you cool Universal -Women's size 19.75 to 22.5" or 50-57cm. Snap fit visor with reinforced anchor points Reflective rear decal to enhance visibility