SUPPORT ASSEMBLY - ATTACHES TO DOMES BELOW THE EAR SEAL TO PROVIDE SUPPORT - FOR AEROBATICS, WHEN WEARING AN AVIATION HEADSET, IT CAN BE WORN UNDER THE CHIN AS A CHIN STRAP THAT HELPS KEEP THE HEADSET IN PLACE DURING HIGH-G MANUEVERS - FOR BEHIND-THE-HEAD MODEL HEADSETS, IT IS WORN OVER THE HEAD TO HELP KEEP IT IN PLACE - DAVID CLARK 10370G-03