Nutcase American Dream Metroride Bike Helmet Adjustable spin dial (which is removable) and three sets of foam pads work together for a perfect fit MAGNETIC BUCKLE and a soft chinstrap makes one handed operation easy and means no pinching of your neck 360 DEGREE REFLECTIVITY from logos and straps dial get you seen at night and a DETACHABLE VISOR keeps the sun and rain out of your eyes Durable lightweight PVC shell with EPS foam meets CPSC certification for cycling ages 5+ 6 massive vents to keep you cool