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Bio Ionic OnePass Iron, 1 Inch, 25.90 oz.

The Fastest Straightening Iron Ever. The OnePass Iron represents a true break-through in straightening iron technology. The OnePass allows users to straighten hair in half the time compared to traditional irons. This is the professional’s #1 choice in irons. With patented silicone speed strips in the plates, it allows users to straighten and style hair in half the time. BioCeramic heaters heat up OnePass to 400 Degrees Fahrenheit with instant recovery for smooth results, roots to ends. OnePass Iron plates emit natural negative ions and far infrared energy that break down water clusters on the hair surface into smaller molecules that penetrate deeper, hydrating hair, removing frizzies, and creating healthy-looking, shiny hair. It’s Multi-level heat controller, and 9 ft Swivel Cord make it one the most preferred irons chosen by stylists.

Key features

  • Silicone Speed Strips for faster straightening and increased shine
  • Instant heat up to 400 DegreeF/200 DegreeC and instant recovery
  • NanoIonic Mineral fused to cushion plates
  • High levels of negative ions and Far infrared energy for silky smooth conditioned hair
  • BioCeramic 5 Second heaters

Honest reviews


Yes! One pass

It’s only one pass and enjoy your silky hair. Just like everyone said, it takes u less time to get your hair done. I always straighten my hair before I sleep and cover it, then the next morning, my hair is straight, silky and no frizz at all and it lasts until the following wash.The reason why I gave this product 4 out of 5 is that i have noticed dramatic hair loss after the first and second use. I only adjusted the temprature to 240 as I do have fine hair but my hair got a little thinner since I started using this flat iron. I am still amazed how could a 240 degrees cause this massive damage!I would have really liked to give this product 5 out of 5 as it really does exactly what it says but I am not sure if I can recommend it to all hair types!

Eula West River, MD

great straightener!

My hair stylist recommended this straightener to me, so I decided to try it out. The plates glide over my hair effortlessly and do not snag, which my last straightener was doing- causing my hair to be damaged. it heats up very quickly and has different temp settings. The only con is that it takes me more than "one pass" to get my hair straight, but then again I have coarse, curly hair.

Abigail Idleyld Park, OR


It wasn’t what i expected, it was amazingly better! i have baby-fine hair and had purchased other flat irons that just wreaked havoc on my tresses. i was super excited to use this for the first time and was pleasantly surprised at the quality of the iron and the bone-straightness it made my hair. i couldn’t be happier with this product. i was not looking forward to paying this much for a straightener but it was well worth the investment especially since i bought a cheap knock-off from ebay that left me broke. thank you for reading my review, you will love this product.

Grace Florence, WI

Like everyone says, it’s great!

Just got the OnePass 1″ straightening iron and it’s exactly what I wanted.It’s fast and easy to use, heats quickly and evenly – and best of all, gives me amazing results. I can do my medium-length hair in under ten minutes, and besides the straightening effect, my hair seems to come out healthier looking and silkier. Definitely better than other irons I’ve tried.Otherwise, it seems well made and pretty rugged. Love the controls that let me home in on just the right temperature, and that the cord is long without getting in the way too much. Definitely worth the price if you’re looking for a terrific straightening iron.

Nanette Hanna, UT


I love love love this straightener…it does exactly as it says it does and thats straighten hair in one pass. I get done flat ironing my hair in 5 minutes now when it used to take me at least 15. Its a breeze to use and great for my long hair!

Alejandra Crawford, GA

Works well

This flatiron works really well. I needed a new flatiron because other flatirons were not doing the trick. This works fast and straightens my hair without frizz. It cut my flatiron time in half. My hair stays straight. I bought it after reading other reviews because I did not want to spend a lot a month another CHI that does not even work that well.

Sheila Newnan, GA

Excellent flat iron.

LOOOOOOVVVVEEEE. Really worth every penny.

Sonia Pewaukee, WI

Great iron

Leaves your hair really shinny. Easy to use, perfect size, I have long hair and this size is perfect. The cushion is really useful.

Chelsey Merrillan, WI