a couple small pieces of crumpled up Kleenex. You should come out and listen to my .220 Swift and .30-378. Standard ear plugs from a safety supply shop should work fine. I am not a big headphone style hearing protection fan because they mess with my cheek weld (just like a ski-doo or quad helmut). But i bought some of those electric ones that let you hear others conversation but still block major decibels. when at the rifle range I was very impressed and they were not expensive. In typical big game hunting situations you want to hear a twig break 50 yards away, and that is one reason that I avoid muzzle breaks on my rifles (pardon, huh, what?). Muzzle breaks are great for sighting in scopes at the bench or practice shooting at the range but they can seriously damage your hearing. I said "THEY CAN SERIOUSLY DAMGE YOUR HEARING" and once it is gone you cannot get it back. There are no cures for that. I am a right handed shooter and with all right handed rifle shooters, it is the left ear that goes first, just ask my wife. "Yes dear, No I did hear you, Yeah I know, what did you say?". For myself, it is my high frequency (and I have been tested due to my employment conditions) Pardon, What. I have one of those cheapo high frequency alarms (you know beep beep beep beep). When I am sleeping on my right side at 5:00AM (every G-d D-M morning) she will give me a cross check and say "your alarm is going off". To all of you younger guys on this great website that have your whole life ahead of you (and can still keep your hearing) I just want you to understand the potential health hazards to using ANY muzzle brakes on your rifles without approved hearing protection. I have an aftermarket Gill Style Muzzle break on my 50 HS BMG from Alberta Tactical that is worth every penny when it comes to recoil reduction however this thing will blow your hat off lay the grass down and potentially Fu--K your ears up if you are not wearing proper hearing protection.