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The plates of the HSI Professional are made of solid ceramic that is infused with tourmaline. The combination allows for consistent temperature and gives hair a smooth finish. The wide range of heat settings, starting at 140 degrees Fahrenheit and going up to 450 degrees Fahrenheit, gives you more control over styling and makes this an ideal straightener for multiple hair types.

In short YES! You absolutely can use too much heat on your hair. Burning hair is not a good smell, it’s not a good look either! You may end up having to get a pretty severe haircut if you’re not careful about the amount of heat you put directly on your locks. Read through this to get an idea of what’s safe and what will leave you wishing for a good trim (or possibly a wig).
Despite these downsides, the HSI Professional comes with plenty of positives, including extras not often found with other hair straighteners. Along with the straightener, you'll receive a carrying case, a heat-resistant glove for easier hair styling, a style guide, and a travel-size argan oil leave-in hair treatment serum to smooth and protect your hair. This is more than most high-end hair straighteners come with, all for a fraction of the price.
Achieve straight, sleek locks: Mist hair with ghd heat protect spray and place a fine section of dry hair between the plates of your ghd Classic Styler. Ensure that the styler is as close to the root as possible before closing the plates. Then gently move toward the tip of the section in one simple gliding motion. Repeat the process with each section of hair, gliding once from roots to ends.
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