The beautifully designed Nutcase Gen 3 Helmet now features new sizing improved ventilation lighter weight better reflectivity detachable visor and removable spin dial. It has exterior crumble zones an injection-molded ABS shell fully padded interior and EPS foam liner. 11 strategically placed vents cool the entire head 2 front intake vents 7 top-mounted exhaust vents 2 back exhaust vents. Air channels in EPS also enhance ventilation while the optional visor protects your vision from sun and weather. Fidlock magnetic buckle gives easy single-handed adjustment. The spin dial system offers a precision fit and 360 reflective details keep you visible in low light. Certified CPSC for Bicycle Riding and ASTM F1492 for Skating.