GMax GM68 SPC Solid Helmet - Large/Matte Black Following the great success of the GM46, GMAX introduces the GM68 with some of the same features! Gmax's exclusive L.E.D.system incorporated into the rear vents is still an industry leader.Features. 19 vents for state of the art venting. 9 intake vents and 10 large exhaust vents to get the hot air out. Max airflow is achieved thru shell/styro comfort liner vents. High air flow top intake vents feature larger controls for easy use with gloved hands.