I'm not sure if this is really the right topic, so if this is the wrong please say.
I'm looking for some ear plugs. I prefer in-ear, however if it works, it works.
I will be using them in a very large exhibition hall, where the noise is crazy sometimes. There are hundreds of people talking and I need to concentrate on my work. Ideally I would like something under £20 if anyone has any personal recommendations.
Edit: sorry, I didn't way. I am looking for reusable plugs, preferably with a good case?