Best type of bedding to prevent dust mites? Cotton? wool? quilted?

I recently found out i might have dust mites. i just purchased a new comforter that i have not slept in yet but i am wondering if it is going to be more harmful then maybe a blanket or quilt. I am wondering what type of fabric is best. I really don't want this problem to get worse? i just bought all the mattress covers and pillow protectors.thanks