I wanted to recommend this product because it worked A++ for me. I have been so frustrated with my hair lately because the roots have been so hard to straighten. No amount of heat or flat ironing would do it. I would end up with nice ends and puffy roots and edges. I bought this stuff from Sally's. It's called New You Thermal Straightening Creme. It is awesome! The product DOES what it says and that is to give you "straight hair with shine and natural flowing softness". No more wavy roots! I was shocked at how easy it was to do my hair. I washed, put the creme in and then blow dried then flat ironed. It also protects from heat and styling damage.
I am a 3C so if you find you have similar aggravation with wearing your hair straight, you might want to give this a try. It's NON-CHEMICAL! It's in a jar like a hair grease would be. Nice smell too. I paid $6.79 and remember if you try and don't like it, you can always return it to Sally's with a receipt.