Yes you do not want kevlar. look for nomex but it is pricey by the yard.They sell these nomex swat team hoods on ebay for less than $20US they could easily be made into a cool beany type hat.As far as buying fire proof material by the yard 1st you need to know what to buy that will depend on how fat your wallet is and what you are using it for.
I sell commado coth on my site it is a heavy demin that is treated to be fire resitant it has a 'FR' rating I only stock it in black it runs $12 US a yard but i can get it in different colors. This matiral can not be washed if so the the chemicals that make it "FR" will wash out.Commando cloth is great for floor drops to replace a wet towel or to make customes that dont get washed..........
when looking for cloths you will neeed to know the ratings
FR-- means it has been treated with something in order to keep it from burning say you get fuel on it and light which I have done in testing it will burn till the fuel burns off but the cloth wont burn on its own
FP means fire proof and expensive. this rating is for materials that are not treated with anything but are fire proof such as kevlar, nomex
if you look around ebay you can find alot of nomex pants shirts and jump suits for fairly cheap.I have a pair of race car driver pants they are nomex i find them great for fire dancing .
or a another real cheap way you can keep your hair from burning is just wet it down before you spin