What is a really good hair product to keep my hair smooth and flat?

I straiten my hair often and i use treseme heat tamer to keep it from getting fried but my hair is naturally poofy and frizzy so it doesnt stay flat. i need something to keep it flat. any suggestions?What is a really good hair product to keep my hair smooth and flat?
great heat tamer it's the one i use! ok so get rusk deep shine. it's a cream and it looks like an aqua green color and smells really good too. that's what i use and my hair looks incredible and shiny. you can find it at trade secret and some salons.What is a really good hair product to keep my hair smooth and flat?
I just started using the 30 day straight smooth strong and long hair treatment by liquid keratin and it seems to be working pretty well. (i always flat iron my hair and it's naturally really curly, frizzy, and thick and it's definitely working well on my hair)
i dont kno a brand name but on the bottles look for something tht says 'for frzzy hair' on them