Fox racing proframe libra helmetfox racings proframe libra helmet is the lightest dh approved full face helmet in the range and comes packed with features fox racings varizorb dual density impact reduction system ensures superior protection against impact and the highly breathable liner system wicks moisture and has antimicrobial properties lightest most ventilatedthere are 24 big bore air vents which make proframe one of the lightest and most ventilated dh approved helmets available on th