Best advice is to always double up. Ear plugs (either foam or tri-flanges) and over the ear muffs. Get the highest NRR rating you can.
As far as ear plugs go, I like to use the Laserlight earplugs. The are a little slimmer and allow the best fit for me. Good ear plugs!
https://www.amazon.com/Honeywell-Vi...576789345&sprefix=laserlight+e,aps,161&sr=8-3
I'll find the 3M FAQ myth sheetNo shit? Never heard of this. I didn’t think it was a straight addition problem but would have thought it was more than 35
Deadly Threat Defense LLC
Firearms Training near Pensacola, FL