I've worked with firearms for 35 years and am very conscious of good hearing protection. I'm afraid I'm not a fan of the Earmold ear plugs having tried them for a while. I also had a hearing specialist make me a custom set, but they weren't much good either. For me, these plugs which are made from hardish material, do not change shape and retain their "seal" when I moved the position of my jaw. To test this, stick your little finger deep in your ear and then open and close your mouth, and you'll feel the ear canal change shape. A fixed shape plug is simply not as effective as a flexible one. I now use Peltor "No Touch" soft disposable ear plugs, which are comfortable, have good sound attenuation, and change shape to retain a good seal when your jaw moves.