Cathy, those aprons are 65% polyester. I wouldn't get near high heat or open flame wearing one.
Bubba,
You're right! I went and checked the one I purchased and it is 35% cotton &65% Polyester, oh well!
My problem with aprons is they feel restricting, and if I feel like I have a straight jacket on I am most miserable! I hate tight fitting ANYTHING give me loose and flowing and I am a happy camper!