yes Lou they are rated on DB reduction. The hard plastic ones I have really do block out all sound, except I can hear the blood rushing in my ears then, but they aren't comfortable to sleep in. I don't think I have a handy package of the ones we use here that I take home, but I'll look at them when I get home and send you the brand. You have to buy them in bulk though, they are only good for about a week, then you need new ones if you wear them nightly.
Naturally ours are to the standard where they protect your ears from the sounds rivet guns make, as well as beat blast booths (those suckers are loud), my H uses the same ones at AA....when they fire up the jets to taxi them.
