The more temperature control options you have, the more control you'll have over the heat you'll be applying to your hair. Keep in mind, any type of heat styling can be damaging to your strands, so you want to take care not to use too much high heat, especially if you're styling daily. Flat irons that have lower temperature options that start around 250 degrees Fahrenheit are ideal for those with thin, damage-prone hair. If you do have thick hair, higher heat settings can help straighten those curls. To help prevent damage, you should start with lower heat first, and then only increase as needed. Keep in mind, anything above 400 degrees has the potential to damage your hair. Even those with coarse, curly hair should stay within the 350-400 degree range to be safe.
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.
That is just one of the reasons that hair straighteners are such a wonderful tool to keep in your beauty arsenal; not only does this nifty little device give you movie star-quality straight hair when you want it (sorry blow out bars), but it can even create the same curls as those confusing barrel-ended curling irons! So, clean out your cabinet under the sink and make room for that makeup you’ve been eyeing or the perfume your husband forgot to buy you for Valentine’s Day last year, because a professional-grade hair straightener can literally replace all of your existing heated hair care tools!

This flat iron is amazing! I have natural curly hair, and I live where it's humid a good majority of the year. This flat iron is good enough to keep my hair straight for a few days. That's with using products like hairspray, dry shampoo etc. I've been using this for about a month, 3-4 days a week, and haven't noticed any heat damage. That's always a plus. I'd say this was a good buy!


The GHD brand is a favorite among celebrity hair stylists because of its reliability and shiny, frizz-free results. Just because you aren't setting foot on the red carpet anytime soon doesn't mean that you can't have celebrity quality hair. The GHD Gold professional makes it possible for you to achieve shiny and frizz free results at home, so you can feel red carpet ready even if you're just grabbing coffee with friends.
HSI Professional is committed to delivering salon-quality styling tools and hair care products to consumers all over the world. All appliances are designed to hold up to salon and home use, while all hair care products are made in the USA using pure Argan Oil containing vitamins A, B, C and D. These hair products are specially created to replenish, reinvigorate, repair, and add shine and smoothness to you hair. Using high-quality ingredients and construction in the expanding product line, this brand is built for you and will continue to adapt around your feedback.
The ability to create bouncy curls or waves with a flat iron (we know, it seems counter-intuitive!) is a biggie in the beauty industry and merits a bit more discussion. If you’re totally lost and there aren’t enough video tutorials on the planet to explain this weird yet awesome process, don’t worry! Just follow along with our step-by-step guide and you will be curling with the best of them in no time!
Oglf.org is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon. Certain content that appears on oglf.org comes from Amazon Services LLC. This content is provide 'As Is' and is subject to change or removal at any time.
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.”
Available with either ceramic plates (good for all hair types) or titanium ones (choice for curly, thick, and coarse textures), this innovative styler features touch sensor technology that lowers the heat when it's not being used, then automatically brings it back up to temp as soon as it's touched. Translation: No more waiting for your iron to heat up in between passes. Use it for smooth and sleek styles, or take advantage of the round brush-esque attachments to create more of a bouncy blowout effect.
×