A helmet equipped to ride it all, from downtown streets to twisting climbs to singletrack trails.The Giro Revel\'??s confident style, superior ventilation and compact design complement nearly any ride. Full coverage shell Snap fit visor with reinforced anchor points Reflective rear decal \'In-Mold\' polycarbonate shell with EPS liner Fit System 22 ventsSize: 54-61cmThe Acu Dial Ventilation uses easy single-handed fit tension adjustment with a full 360Çï\' fit band for a quick, stable fit. It\'??s also ponytail-compatible, for riders with longer hair.