Both inexpensive and high-end flat irons come with a wide range of features. If you plan to travel out of the country often, then a tool with dual voltage might be a good option. Or you might find that the Bio Ionic’s vibrating plates are something you can’t live without after trying. A long cord that swivels at the end of the handle to ensure ease of use might also be an important feature for you. Some features you might not need include pads to rest your flat iron or gloves to protect your hands — both accessories our testers didn’t think were necessary. When researching flat irons, make a list of your must-haves and make sure the one you choose includes your top features before purchasing.
When you see the perfect hairstyle, whether it's curly, wavy or straight, you want a professional styling tool that can help you try a little bit of everything. NuMe hair straighteners can do just that with a cascade of features that offers your hair just the right amount of TLC. Take your time when you style these tourmaline ceramic and professional titanium hair straighteners, to reveal your shiniest, healthiest looking mane yet. 

Given its tiny stature, it is no surprise that the BaByliss Pro Nano Titanium Straightening Iron is ideal for users with short or medium hair lengths. Unlike the more industrial models we reviewed that are designed for longer or thicker hair, this BaByliss hair straightener is small and light enough to polish off a short bob or shoulder-length style in no time.
The MHD professional flat iron hair straightener is great for creating loose curls because it’s got smooth plates and negative ions that leave your hair soft and frizz-free. The 3D floating plate allows your hair to glide through without catching or breaking, and reviewers love it because it’s durable, reliable, and works on any type of hair — even the most stubborn and frizzy.
You're on your way to work with your perfectly styled hair, ready for that big client meeting…and suddenly you're not sure if you remembered to turn off your hair straightener. Cue the mind spiral where you imagine being responsible for your entire apartment building burned to the ground. We admit. it may be a bit dramatic, but it's definitely not a good feeling to start the day with.
While there are a lot of great options to choose from, our all-around top pick is the LumaBella Keratin Duel Touch Hair Straightener. Featuring unique, keratin-infused plates for optimal shine and less damage, the LumaBella Keratin Duel Touch Hair Straightener proves that technology really can make a difference when it comes to hair care! We also love this model’s innovative smart heat sensors that protect hair from heat damage and lock in moisture.
If you have trouble remembering to unplug your flat iron before heading out, you’ll appreciate the Chi Air’s one-hour automatic shutoff. Since people have preferences regarding auto shutoff this wasn’t a criteria for us, but our testers thought it was helpful. One tester said she often leaves her flat iron on in the morning and invested in a timed switch to make sure it’s off. So if you’re forgetful when it comes to turning off your tools, then auto shutoff might be an important feature for you.

Heat protectants contain ingredients that coat hair and slow down heat induction. Janine Jarman says, “Blow dry your hair properly; use a heat protectant product; and with the right iron, you should not have to make a bunch of passes to get the results you want.” We used TRESemmé Expert Selection Heat Protection Spray, Keratin Smooth. Most of our testers liked how it worked on their hair and felt a noticeable difference when using it. Our tester with kinky hair didn’t use the product because she knew it wouldn’t work on her hair. Instead, she recommends using an oil (like an Argan oil) or a hair grease to add moisture to the hair, which makes it easier to straighten.
Anyone with naturally curly knows that the trick to keeping your curls looking their finest is all about moisture. Whether you’re hoping to sport a straightened style for an evening or two, or just to polish your existing curls, a great hair straightener can help you get the look you’ve always wanted without causing permanent damage to your precious curls! When shopping for the perfect hair straightener for your curly hair, you’ll want to keep the following in mind:
The Bio Ionic worked well on all of our testers’ hair, but it’s best on drier hair with a medium thickness. We spritzed testers’ hair with some keratin smoothing treatment, but the Bio Ionic did a lot of the heavy lifting to make our hair feel softer. The tool gets hot, but not too hot to grip, and it excels at creating the silky volume you want without making your hair pin-straight and flat. One tester put it perfectly: “[The Bio Ionic] is the Rumplestiltskin of hair straighteners. It’s turning straw into gold.”
This is an absolute MUST HAVE for anyone with natural black hair. We talked earlier about how dangerous low-end flat irons can be for anyone with type 3 or type 4 hair, and this is precisely why. If you fit into those hair types, any straightener without an adjustable temperature control is likely to be way too hot for your hair to handle – especially for long-term use.

With a maximum temperature of 450° F, the BaByliss Pro Nano Titanium Straightening Iron can really pack a punch despite its otherwise small frame. One thing to note though: these heat settings are not pre-set like the CHI G2 hair straightener we also reviewed, and you will need to play around with them to find the right temperature for your hair. This shouldn’t be a problem if you have a Saturday afternoon or two to kill, but may not be ideal for users that are looking for a flat iron with pre-recorded settings.
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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