Faraday Defense NX3 5"x7" Bag

Not bad

We've used these as we went through security leaving and entering to insure that our phones were isolated from government snooping and any ne're-do-wells hanging about. I don't have eveident that they actually worked, but I even if they only mostly worked, this is much better that nothing. They are a good size to hold our phones and very securely seal up with the fold over and velcro seal. I will test them more as time goes on and if they are as good as I suspect, I'll buy more in the future.