Giro Verona Women's Universal Fit Cycling Helmet - Women's Matte Titanium Floral Full coverage shell with snap fit visor Single universal size with Acu Dial fit system Reflective rear decal adds extra safety In mold construction combines polycarbonate outer shell with impactnabsorbing foam liner On the back of the helmet is a strap in a little circular dial that can be turned to adjust the fit of the helmet and 22 cooling vents