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.”
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.
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.

The CHI brand has long been one of the most popular for hair straighteners and flat irons, and for good reason – their products work well and they work quickly. The CHI Original Pro 1” Ceramic Tourmaline Flat Iron is no different. Thanks to its durable build, quality craftsmanship, and leading tourmaline-infused ceramic plates, this is the last hair straightener that you will need to buy for a long time.
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.
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!
For better or worse, we are B-U-S-Y nowadays. Running from meeting to meeting and trying to pick up our kids from carpool before soccer practice, it’s no wonder that we often place ourselves at the bottom of our daily priority list. This mindset typically carries over into our appearances and explains why more women than ever are rocking messy top knots and buns than ever before.
The HSI 1st Gen Professional Ceramic Flat Iron is designed with tourmaline-infused ceramic plates, generating negative ions and allowing smaller water molecules to penetrate into the hair shaft to reduce frizz and static. Built for durability and lasting results, the floating plates give the flexibility to flip, curl or straighten your hair – all with a single iron.
Most reviewers on Ulta love the GHD Gold, praising how quickly it heats up, how it makes their hair feel, and how long this tool has lasted them. Some reviewers did feel that it was too expensive and didn't like the lack of control they had over the temperature setting. While those with very fine hair may find the 365-degree setting too hot, the lack of different settings, in this case, is to help prevent hair damage. The price is steeper than some, but it's also a straightener that's built to last, which helps justify the price.

One of the great things is that it has an automatic shut off. Very long cord (9-feet) is something that many users really like. If you travel a lot, then GHD Classic Styler is the one to take with you. You will be able to use just about everywhere. This is also beautifully designed straightener that you will love to show to others. See the best 2 inch flat iron by ghd.
One of the Babyliss’ major drawbacks, and why we only recommend this flat iron for experienced users, is the outside gets hotter than any of our other picks. Hot to the point that it was too hot to hold. One tester said she was “afraid to accidentally touch the top of it.” Others said they could feel the heat against their scalps. At first, another tester said she didn’t mind the heat. This was moments before she burned the top of her hand when it merely grazed the side of the tool.
Featuring the same 1.25-inch plates CHI users have loved for years, the new CHI G2 Ceramic and Titanium Flat Iron make it easier to style longer hair! If you’ve ever tried to use a non-professional hair straightener on your hair, then you know just how quickly the process can become a literal pain! From hand strain to sore wrists and arms, most hair straighteners stick to old adage of “beauty is pain.”
Nearly 21,000 people gave this flat iron a five-star review on Amazon. If they factored price into that rating, then I agree. For less than $60 it’s pretty spectacular, but it doesn’t beat the fancier ones in terms of performance. The temperature automatically drops after 15 minutes of use. And while it’s easy to adjust that, it is also slightly inconvenient.
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