On the way to Bosnia, 94-95, we took possession of our new composite helmets. Something French IIRC. Anyway, we couldn't get the blue cover to fit properly. Some mechs came in the next day and their's were perfect. Asked how they made it stay in place, they answered "With a staple gun." Yup, the staples were penetrating the shell. Again, IIRC, we got new helmets before we deployed.