You know, you can get custom molded earplugs that are far superior and WAY more comfortable than the foam ones. Most are designed to try and create a flat response, so it doesn't sound muddy. These are excellent for wearing for extended times or going to a concert and wanting to reduce the noise while still being able to hear. Many are also available with swappable filters that allow you to select 10dB, 20dB, etc. reduction.