[Scorpius]

I need to use in-ears in special kind of aviation for signal hearing purposes. No need for hifi (they will wear out quickly in this case), emphasis on passive insulation. I understand shure IEM's has excellent insulation, but its not exactly budget...
Klipsch, Bose, Sennheiser + all "cheap" brands rarely display their insulation value so any recommendations are welcome.
 
Thank you