For ear protection, I don't use electronics, just plain old Devid Clark aircraft handler's earmuffs, meant for those working around jet engine exhaust, with Army triple-flange earplugs worn in addition in my right ear, the one that still works; I've often also got a chunk o0f beeswax in a jacket pocket or earplug carry tube that I can use if the official earplug isn't to be had. I was a tank gunner, and though the left ear was closer to the breech of the tank's main gun, the right one was about a foot away from the solid steel armor of the turret. The sound wave pressure bounced off it into my ear, and it's been WHAT? on that side ever since, so I like all the protection for my little remaining hearing I can get.
You know that you can shop online at Army Air Force Exchange now as a veteran? https://www.shopmyexchange.com/ is tax free and free shipping. You do not need to be retired to shop online.