HRA 3 The design is really cool and it is well constructed and of good quality. Unfortunately, however, I can't use it as it causes a rash. I though at first that it might be the metal fastener, so I covered it but, unfortunately it seems to be the plastic (which makes no sense, as I have never had a problem with rubber or plastic before). Washing does not help.If you do not have sensitive skin, you will not be disappointed. If you do, then this is likely not for you.