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.
While you might think that a hair iron is only necessary to straighten curly hair, a hair iron is actually a great tool for styling straight hair. A flat ceramic flat iron can help smooth away flyaways and a add sleek shine to your hair. You can also use a flat iron to shape straight hair, and you can use it near your scalp to add volume to limp hair.
If your hair is plagued by tangles and knots on a regular basis (even in between straightening!), try switching your hairbrush out for a wide-toothed comb! The added space in between the teeth gently separately knots and tangles without the painful “Ouch!” with each stroke. If that still isn’t enough to tame your stubborn tresses, try a wet brush! These brushes are specially designed to work through knotted, wet hair without any tugging or pulling.

Xtava’s two inch-wide plates are massive, making them perfect for people with thick or coarse hair. Aside from the plates, everything else about this flat iron is fairly standard. You can use it at a temperature range in between 265 and 445 degrees Fahrenheit, the plates are made with tourmaline and ceramic, and it takes less than two minutes for the tool to fully heat.
T3’s white and rose gold flat iron seems too pretty to reliably function, but hey, sometimes miracles happen. There are four temperature settings ranging from 260 to 410 degrees, and the tool heats up in about a minute. Its ceramic plates are infused with tourmaline, a mineral said to make hair extra smooth because it emits negatively-charged ions. There’s no scientific evidence to support this, but my unscientific bathroom study found that this flat iron does indeed make my hair look shinier.
Bio Ionic 10X Pro Styling Iron 1" - Nano Ionic - with Vibrating Plates The Bio Ionic 10X Pro Styling Iron 1 Inch is part of the Luxe Pro Styling Collection. Natural Volcanic Rock Minerals infused into the Bio Ionic Luxe Pro Styling Collection are uniquely refined to emit negative ions that drive tiny water molecules deep into the hair. Hair becomes hydrated and conditioned on the inside, while the outer cuticle layer lies flat and smooth, trapping moisture, giving it a vibrant shine.
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.

Not sure which temperature setting is right for your hair? We recommend starting slow and building up to higher heat settings gradually. Not only will you be able to perfectly identify the optimal heat setting for your hair, but you will also avoid overheating. After all, very few of us actually need upwards of 400° F to see the salon results we’ve always wanted!

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.
Eight embedded sensors regulate and evenly distribute the heat on this ceramic iron, minimizing damage and increasing shine and smoothness. With adjustable temperature settings that go as low as 140 degrees (the coolest we've ever seen), it's ideal for anyone with super fine hair, or to smooth out the tiny frizzies around your hairline. It also comes with a lifetime warranty, which is never a bad thing.
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