Straightening irons, straighteners, or flat irons work by breaking down the positive hydrogen bonds found in the hair's cortex, which cause hair to open, bend and become curly. Once the bonds are broken, hair is prevented from holding its original, natural form, though the hydrogen bonds can re-form if exposed to moisture.[2] Straightening irons use mainly ceramic material for their plates. Low-end straighteners use a single layer of ceramic coating on the plates, whereas high-end straighteners use multiple layers or even 100% ceramic material. Some straightening irons are fitted with an automatic shut off feature to prevent fire accidents.
Derek Yuen, the man responsible for Cole Sprouse's grown-up new look, recommends the GHD Platinum Professional Performance iron. The flat iron is consistently and evenly heated at 365 degrees, which is safer and less damaging on the strands. “The beveled edges also allow for infinite styling possibilities, not just just for straightening hair,” says Yeun.
Be sure to protect your hair against heat damage with Xtava’s Heat Protectant Spray every time you style. Not only does our heat protectant coat your hair with a lightweight layer of protection, but it also repairs hair from the inside-out with broccoli seed and Brazilian pequi oils to replenish moisture, restore shine, and infuse essential nutrients.
STEAM INFUSED WITH ARGAN OIL OR PURE WATER PREVENTS HAIR DAMAGE: Designed with steam compartment that can be used for Argan Oil Serum or water, PureBlackMagic Steam Infusion Hair Straightener releases steam within 60 seconds of heating. The conditioning steam infuses moisture back into your hair, locking in natural oils and adding more shine to the finish.
If you're looking for style versatility, NuMe hair straighteners are designed to do it all and allow for some creativity too. Each authentically crafted NuMe hair straightener offers only the highest quality materials, including 100 percent pure tourmaline ceramic, stone ceramic, and titanium plates. With beveled edges and floating plate design, you'll never snag your locks or be confined to one style. Create fashionable curls, crimped looks, relaxed beach waves and so much more. Unlock the possibilities with your NuMe hair straightener. 

“I wanted a straightener I could use on wet hair, since I’m usually on the go and don’t always have time to dry it. With this Wet 2 Straight Hair straightener, I was able to straighten my hair after it was towel-dried and only had to go over my hair twice for it to be completely dry. Granted, I have semi-thin hair, so it doesn’t take too much to straighten it, but with other straighteners, I would have to go over it about three or four times and couldn’t straighten it when it was wet.”


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.
“Being a mom of two, it’s hard to have time to get my hair done, but with this, I do my hair in 30 minutes, rather than over an hour. I haven’t bought a new straightener in probably four years, and I bought this with very little expectations. OMG! First of all, not only did it take half the time to do my hair, but it left my hair as amazing as I always wanted it! Super silky-smooth. I then used it to make some curls on my 8-year-old. In less than 15 minutes, I was done with her hair and she was in love with the curls.”

The nano ceramic plates in this straightener deliver far-infrared heat, a gentler alternative in and of itself. As if that weren't enough, there's also a reservoir where you can pour in some of the (included) argan treatment and thermal protectant, creating a conditioning steam that will strengthen and safeguard strands while you straighten. Admittedly an extra step, sure, but one that's well worth it.
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