Because of the Heathrow noise, I have been sleeping with earplugs in pretty much since I moved in. I have been increasingly unhappy with the foam ones, and went online shopping. I found a website that specializes in them, and when I emailed them for some advice in choosing the right pair for my situation, they offered to send me "a selection of types" FREE OF CHARGE so that I could see which type I preferred before making my decision!
That type of customer service is becoming increasing rare and I am tickled pink!