Can I wear RunPhones when it's raining?

Yes. It would defeat the wicking feature of the headband, but you can still wear them in the rain. If the speakers get wet, they will start to sound funny. It would not damage them. Just take them out of the head band and hang them up to dry. They should work fine once dried. We don't recommend dunking the speakers into buckets of water for long periods of time, but if they get a little wet, they will recover.