What was found
(CAN) AT APPROXIMATELY 0150Z, IN CRUISE, AT FL340 THE CREW EXPERIENCED A FUME LIKE ODOR "STINKY SOCKS " NOT AN ELECTRICAL BURNING ODOR. THE CREW DAWNED THE COCKPIT O2 MASKS FOR 5 MINS TILL THE FUMES DISSIPATED. A PHONE PATCH BETWEEN DISPATCH, ACFT AND MOC WAS DONE, DETERMINED TO BE A POSSIBLE BLEED ISSUE. CREW WAS FINE TO CONTINUE. CREW WAS ASKED IN ANY MEDICAL ASSISTANCE WAS REQUIRED AND THEY SAID ALL GOOD NOT REQUIRED. RESOLUTION APU BLEED ON. KEEP 2 PACK RUNNING FOR HALF HOUR. NO MUSTY SOCK ODOR.