Earplugs for conerts?

I'll second what Danvetc had to say, with a twist...I worked for several years, on and off, doing concert stage work (sound, lighting, security, etc.) and had to be able to clearly hear not only the music, but also my two-way radio, the stage manager barking orders or the fanatic fan explaining why he/she just HAD to get backstage...you get the idea. Anyway, I always used the expandable type from a company, I believe, called EAR. These are the bright yellow foam type of earplug and are really inexpensive. The twist is to cut one plug in half and use half in each ear. This way, the sound level is lowered enough to avoid hearing damage, but is not so muffled. An added benefit is that you don't have napkins hanging out of your ears (grin). No one will even know they are there, unless they are standing beside you looking into your ear. Just be careful not to insert the half-plugs too far, or they could be difficult to remove...especially if you have large fingers. Hope that helps you enjoy the show!