Ear plugs for live musc.

My wife & I enjoy live music but I can't handle how loud it is. We recently saw Nancy Wilson's "Roadcase Royale" and it kicked my ears ass. For the last dozen years or so I have been using tissue paper to dampen the DB's.  I thought I read here some time ago about ear plugs to lower the sound levels but still allow the whole sound spectrum through.  I saw on Amazon something called Eargasms or some such. 
Can anyone recommend something that they found works well?  I did a quick search in misc. audio but really didn't find what I was looking for. 
Thanks, John