You should be fine. As long there's nothing that could be construed as a weapon. (Not saying you were planning on that but idk what is considered rave attire), so not trying to sound rude.
As long as it passes the metal detector test...
You can wear whatever. But probably nothing with spikes or anything that could be used as a weapon like Jen said. Places are becoming a little more strict on things like that and bags/purses.
When in Rome...
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