Insect filter for Schuberth C3 helmet

The Schuberth C3 helmet has two 15mm (about 19/32") holes for its ventilation system on the inside that have a direct connection to a large air intake on top.

That's a good idea, because your head gets cooled in summer, but not carried out the best way, because they forgot to add a fly screen between the shell and the cushioning and therefore now and then you get insects in between your head and the helmets shell, and sometimes they survive...

So I made this thing to prevent them from comi