Sound makes it through most fabric quite well, so putting them in a hat or croakie is not a problem. Fortunatly wind does not pass through fabric as well.....
Thanks for the informative post. I'm wondering if the mics will be fine sitting inside a "non-ventilated" hat (e.g. not using hat mount holes, or well ventilated hats like trucker caps)? Seems like everyone talks about using trucker caps or those ventilated Kangols, but are they really necessary?