Negative ions have been a longtime fan favorite in the hair care industry, and it is no surprise that this same technology would appear in our top picks for the best hair straightener. Negative ions have been found to reduce static and frizz while locking in moisture, and the same goes for your hair when you use the CHI Air Expert Classic Tourmaline Ceramic Flat Iron!
With so many models and styles to choose from, it can be hard to find the right hair straightener for your medium or long hair. That’s why we love the Cloud Nine Original Flat Iron! This straightener is ideal for users with medium to long hair; this hair straightener can tame even the most stubborn tresses. Featuring 1-inch plates and low, medium, and high heat settings, this flat iron is ideal for anyone with thick or lengthy hair.
EDITOR’S CHOICE: As the only hair straightener we reviewed featuring Keratin-infused ceramic plates, the LumaBella Keratin Duel Touch Hair Straightener is our top choice for the healthy, shiny hair you’ve always dreamed wanted! With a unique, floating plate design and smart heat sensor, this hair straightener is ideal for a variety of hair types and reduces breakage and splitting by up to 50%.

Most mid-grade and high-end hair straighteners come with plates that are 1” or 1.5”. If you are looking at one that is 2”, 2.5”, or even bigger, steer clear immediately. Not only does larger plates make it easier for you to accidentally over-iron (and seriously damage) your hair, but they also make it more difficult to get all of the way down to your roots. For anyone with type 3 or type 4 hair, trying to use a large-sized flat iron would be far more trouble than it’s worth.
While temperature control is typically a good thing to have in a hair straightener, it can also result in hair damage if you're keeping the temperature too high. The GHD Gold eliminates the chance of any user error, operating at an even 365 degrees Fahrenheit. This is the optimal temperature for most hair types, getting you smooth results without damaging your hair. The gold coated ceramic plates heat up quickly and maintain an even temperature, eliminating the chance for any hair damaging hot spots as well.

Straighteners work because they have flat plates that get hot and touch together on either side of your hair. By doing that, they put heat through your hair follicles, trap in moisture and take out frizz. The plates on a flat iron can be made of several different materials, and they’re good for different uses. The best iron for you varies depending on the type of hair you have, the type of styling you want to do, and the amount of heat your hair needs.
We loved the Bio Ionic’s user-friendly design. Two of our favorite features are its bright digital temperature control and the instructions stamped directly onto the tool. It also feels natural in the hand, and its matte finish provides a slight grippiness, but doesn’t pull at the hair when styling. Plus, the tool sports a uniquely shaped plate that’s curved at the tip and makes it really easy to get close to the scalp. One tester who is new to using flat irons said the Bio Ionic felt intuitive and even encouraged her to try harder styles, like creating curls and waves.
If you travel abroad often, you won't have to worry about ruining your investment, either, because the GHD Gold has universal voltage. It also features a generously long 9-foot cord with 360-degree rotation to prevent tangling. The automatic sleep mode shuts off the straightener if it hasn't been used in 30 minutes, so you'll have peace of mind if you forget to shut it off in your morning rush out the door. If something does go wrong, the GHD Gold comes with a 2-year manufacturer's warranty.
The glider plus is designed to protect your hair with integrated heat balance micro processors that continuously monitor the exact temperature across the surface of the plates and automatically adjust the temperature for evenly distributed heat. That means fewer passes are needed for silky results, while protecting your precious hair from over heat exposure.

Features like this prove that hair straighteners really have come a long way over the last decade, and the LumaBella Keratin Duel Touch Hair Straightener certainly doesn’t disappoint in this regard! When the terror of hair damage is removed from everyday straightening, there’s no limit to the styles you can create with a hair straightener like this making this an ideal choice for novice and expert stylists alike!


Sadly, the plates in the LumaBella Keratin Duel Touch Hair Straightener won’t begin to magically levitate on your bathroom sink! BUT they do float in the frame! They are specially engineered to deliver a consistent heat with a smooth glide, and their design enables a flexible grip on the straightener, giving you great results no matter how you hold it. Even better, it won’t tug or pull like so many others on the market. The result is pain-free styling in a fraction of the time!
Celebrity hair stylist Priscilla Valles’s go-to straightner is the classic GHD 1-inch straightener. “I start in the nape and bring down small sections, one row at a time and I use a GHD flat Iron with a comb in the other hand,” says Valles. “I place the comb in front of the iron while ironing at the same time in a slow motion all the way down. Never stopping cause that will cause dents in the hair. At the end a dime size of ouai rose from top to bottom just to add some shine and control any fly aways!”
By-and-large, most people with natural hair have some variation of type 3 or type 4 – which is exactly why low-end hair straighteners can be so dangerous. More curly natural black hair has a tendency to be more porous than other hair types. As a result, it can lose moisture easily and become damaged. With the wrong flat iron, this can lead to split ends and breakage after just a single use.

Heat stylers, such as flat irons, get a bad rap for singeing hair beyond repair, but that doesn't have to be the case. The key to preserving your hair's health while using these hot tools is passing a quality straightener over heat-protected strands without letting the heat sit on one spot too long. Speaking of stellar straighteners, here are 11 of our top picks, ya know, if you're looking to upgrade yours.
“Infrared is so beneficial being that the wavelengths are longer and can penetrate deeper into the cuticle heating the hair from the inside out, keeping your hair's own natural moisture, leaving the hair smooth (and) shiny and keeping it extremely healthy, versus other conventional styling tools that actually pull moisture out of the hair, leaving the hair dry, brittle, dull and damaged,” said hair expert and stylist Gina Rivera.
There are a few downsides to the BaBylissPro Mini. For those with longer hair, it may take a little more time to straighten than it would with a normal-sized straightener. It also lacks the 360-degree swivel cord and automatic shut-off found in most full-size hair straighteners. However, these downsides can be overlooked when taking the other features into consideration, like its lightweight, compact size and the fact that it can still hold the same temperatures as a full-sized hair straightener.
GHD’s “styler” is permanently set to 365 degrees Fahrenheit, which the company says is the highest temperature hair can tolerate before it becomes damaged. As a person who went from a dark brunette to blonde highlights, I can vouch for its straightening power on processed hair. And though I don’t typically think of “comfort” as a flat iron necessity, the springy hinge that connects the two plates really did make it easier to clamp and glide the tool down my hair with minimal effort.
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