The Blade Blue Twist Youth Helmet is a TrueFit helmet that has a unique, 1-step, self-adjusting fit system that allows for correct fit every time. It has ten top vents and six rear vents to help keep you cool. Hi-impact reflectors improve visibility and Base Guard provides enhanced aesthetics and durability. Visor offers protection from the sun and elements and PinchGuard buckle for no-pinch buckling. Fits head sizes: 21 5/8"-22 1/2".