The solution? Automatic shut off. That way, even if you do forget to turn off your hair straightener, you can be at ease knowing it will turn off on its own automatically. Not all hair straighteners come with this feature, and if you don't have an issue remembering to turn these types of things off it may not be necessary. Still, a little peace of mind and extra precaution never hurt.

We usually roll our eyes at oil-infused heat tools — but you can actually watch this oil being sucked right out of the refillable cartridge in the handle. When you press the iron closed over your strands, the oil vapor seeps through tiny holes to condition and straighten your hair. And don't worry fine-haired friends: It made our tester's hair silkier, but not like she'd dipped it in an oil vat.

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