Fine or thinning hair can easily become damaged under too much heat, so cooler temperatures (i.e., those under 300° F) are ideal for these hair types. If you have very curly, course, or thick hair, then higher temperatures upwards of 400° F may be more suitable to your needs. With the ISA Professional Titanium Flat Iron, you can cool it down to 265° F if need be and also crank it up to a whopping 450° F for textured styled.
Thick, coarse hair can withstand high heat AND it responds better to it. Using high heat also means that you minimize the number of passes you’ll make which will benefit your hair’s health. You’ll want a hair straightener that has adjustable heat settings with a maximum temperature reaching the 400-degree range like the HAI Beauty Concepts 1.25″ Classic Convertable Flat Iron.
I read lots of different reviews about these straighteners and a lot said these aren't genuine. They are definitely ghds just professional ones which means they are lighter. They are exactly the same ones at my hair dressers. I'm happy.