I have these for exactly that use. Nothing ever gets in.
http://www.bolle-saf...acker-trackerrx
I also use them for air soft and they have taken a point blank hit with my sniper rifle as a test which didnt even leave a mark.
Any optition will supply them, they will cost the same as the others that your company would normally pay for. I too had a limiter selection which i didnt like so had a look online and found these, its not something they normaly stock, but if you give them the part number they can order them in.
Edited by Burnard, 17 November 2014 - 01:36 AM.