Bell Adult Quake Bike Helmet Visor offers protection from the sun and elements and Pinch Guard buckle for no-pinch buckling Fusion In-mold design delivers a durable, lighter helmet Spin Action Fit belt offers maximum adjustment at the turn of a dial Proprietary Bell Cam Locks adjust easily for a comfortable fit with 11 vents for a cool ride Pinch Guard ensures no-pinch buckling Fits head sizes: 53-60 cm