Volleyball in the sand combat boots/shoes(you wear no shoes). Volleyball on a court inside hard soled shoes(messes up the floors)
Clothing, at the White Thorn Lodge nudist tournament.
A g-string because the crowd may get too excited. Jewellery as well.
Jewerly or anything metal
Loose shoes that fall off easliy
Jewerly, shoes that would mess up the gym floor, bobby pins or clips in your hair,
You can't wear earrings, bracelets,ankelets,necklaces skater shoes, or any of that. These can all get you a yellow card