Fancy dress is not advised (those big costumes really get in the way) just normal, casual clothes are best.
We are indoors for most of our sessions - so it will usually be comfortably warm (and get can a little too warm on very sunny days) so bear that in mind.
Long sleeves help, can avoid you catching your arm with the bow string, and make the protective arm guard more comfortable to wear, but they are not essential. Long hair is best tied back in a Ponytail, and we'd advise against particularly big necklaces or ear-rings, or pro-truding lip-piercings.
If we do find anyone is wearing anything that could cause a problem, you'll be advised. Should you then choose to continue with it as is, we won't take any responsibility for any damage or injuries sustained.
(If you're attending an outdoor session - then of course dress according to the weather.)