Key ingredients
4.5/5
Bio Ionic lined these plates with silicone speed strips that grip each section and guide it evenly from root to tip, so you make fewer passes.
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OnePass 1-Inch Flat Iron
$217.00
Bio Ionic lined these plates with silicone speed strips that grip each section and guide it evenly from root to tip, so you make fewer passes. Its moisturizing heat is meant to keep strands from looking dry after pressing. Digital control runs up to 450°F, with a 1-hour auto shutoff.
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The Edyt Score
4.7 / 5.0
Targets
4.4/5
This flat iron for black hair is a speed strips.
Formula standards
4.7/5
The formula is a speed strips.
The verdict
Bio Ionic lined these plates with silicone speed strips that grip each section and guide it evenly from root to tip, so you make fewer passes.
Compare against similar products
Side-by-side vs 6 near substitutes (BaBylissPRO, ghd, CROC, Sutra, T3, and FHI Heat). Compare best for, key actives, texture, skin fit, Edyt score, and notes. Swipe sideways to compare.
| Pick | |||||||
|---|---|---|---|---|---|---|---|
| Best for | Thick hair that needs speed | Silk presses at home | Gentle presses on fragile hair | Long or very thick hair | Color-treated or damaged hair | Straightening and curling in one | Mixed textures and edges |
| Key actives | - | - | - | - | - | - | - |
| Texture | Flat iron for Black hair | Flat iron for Black hair | Flat iron for Black hair | Flat iron for Black hair | Flat iron for Black hair | Flat iron for Black hair | Flat iron for Black hair |
| Skin fit | - | - | - | - | - | - | - |
| Edyt score Methodology: The Edyt Score reflects ingredient profiles, concentration, and formulation standards. It is separate from crowd-sourced user reviews. | 4.7 | 4.8 | 4.8 | 4.7 | 4.6 | 4.5 | 4.5 |
| Notes | Speed strips · 450°F max | Nano titanium · 50 settings | 365°F fixed · Floating plates | Infrared · Black titanium | Far infrared · Ionic | Curl mode · 9 settings | Tourmaline · Wide range |
| $ / size | $217.00 | $125.99 | $223.30 | $199.98 | $148.75 | $152.99 | $99.99 |
| Shop | Buy on AmazonThis page | Buy on AmazonProduct page | Buy on AmazonProduct page | Buy on AmazonProduct page | Buy on AmazonProduct page | Buy on AmazonProduct page | Buy on AmazonProduct page |
FAQ
Who is OnePass 1-Inch Flat Iron best for?
Bio Ionic lined these plates with silicone speed strips that grip each section and guide it evenly from root to tip, so you make fewer passes. Its moisturizing heat is meant to keep strands from looking dry after pressing. Digital control runs up to 450°F, with a 1-hour auto shutoff.
How did Edyt Beauty score this flat iron for black hair?
Edyt Beauty rates OnePass 1-Inch Flat Iron 4.7 out of 5 from the ingredient list, who it is for, and how the formula is built. That is separate from crowd-sourced user reviews.
How does it compare to similar products?
The compare table above stacks OnePass 1-Inch Flat Iron against near substitutes for the same shopping job, including picks from BaBylissPRO, ghd, CROC, Sutra, T3, and FHI Heat. For more from the same brand, see More from Bio Ionic below.
Where can I buy it?
Shop OnePass 1-Inch Flat Iron with the Buy button when it is available. We may earn a commission from qualifying purchases. Prices and availability can change. You can also find it in our guide to Best Flat Irons for Black Hair.
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