ITEM TITLE :- SA-1 Aeronautics Mat Moon Full Face Yellow Helmet 600mm L Size , SUITABLE FOR :- 1. World first helmet with NACA Duct air flow technology, this air flow system is also used in aircraft's and super cars. , 2.The double NACA inlets above the shield allow the entry of the large volume of air inside the helmet to refresh and dehumidify the interior. , 3. The NACA inlets on the back of the helmet allow quick extraction of the stale air. , MATERIAL :- NA , PART NUMBER :- NA , Size L