Demon Zero Full Face Mountain Bike Helmet Adjustable visor and included aluminum screws (not the cheap plastic ones that come with most full face helmets). Interior foam is an EPS liner that absorbs impacts with great effectiveness. Multiple vents capture and help circulate the airflow and keep your head nice and cool. The Zero weighs in at only 2 pounds 3 ounces. The liner is also removable so you can wash the dirt and grim and keep the helmet looking and smelling clean!