Are fanny packs allowed to be worn in school?

my friends i go to school with always take my handbag and hide it or something as a joke. it was funny a couple times but its annoying me now and the more i ask them to stop the funnier they think it is. i dont wanna get them in trouble so the only solution i can think of is to wear this pink checkered fanny pack thats been sitting in my closet for the past year and a half. if i have a fanny pack around my waist i figure they won't be able to take it to mess around with. i don't know if the teachers would let me keep it on though or would they make me take it off?? because if i can't wear it theyll just do the same thing