BIO IONIC Onepass Straightening Flat Iron

Last updated: June 25, 2020

We looked at the top Flat Irons and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Flat Iron you should buy.

Product Details

In our analysis of 74 expert reviews, the BIO IONIC Onepass Straightening Flat Iron placed 16th when we looked at the top 17 products in the category. For the full ranking, see below.

From The Manufacturer

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.

Expert Reviews

What reviewers liked

An attractive choice for fast yet gentle styling thanks to ceramic plates. Varied heat settings give users full control, regardless of hair type.
Consumer testers thought the Bio Ionic One Pass flat iron did a better job of straightening long thick hair, so it may be worth the high price tag if you have hair that is harder to straighten.
The Bio Ionic OnePass heats up within seconds, not minutes, making it one of the more efficient straighteners out there today. It also straightens hair in half the time of similar models, for speedy, high-quality ironing.

What reviewers didn't like

Lacks an automatic shut-off switch.
This iron excelled in most of our lab tests, straightening hair quickly and making it smooth and shiny, but faltered slightly in its ability to keep hair frizz free after straightening.
Silicon tends to attract more residue and dirt from your hair than non-silicon plates, so you will want to make sure to clean this model after every use to keep it clean and sanitary.
View our Flat Iron buying guide for in-depth advice and recommendations.

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