Use these for rehearsal and performance. They are good, sits fine in the ear canal and sound is fine and reasonably natural as well. I would have liked a little more damping. After some hours the ears may feel a little tender.
Wear on-stage, sound check and during rehearsals. Pretty comfortable despite I have piercing in ear channel. Damn good material - it sticks to your clothes so well that you're not afraid to lose these while aggressively headbanging :)
Though there are a couple of small drawbacks. 1. I have big ears. These protectors have 1 extra pair of plugs of a slightly different size. Though these are still a bit smaller that i would like to. 2. There's a cord to connect these plugs and hang these on your neck when not using. Though it was a real challenge to pull it on. 3. There are no replacement filters in case if you loose one.