Bio Ionic OnePass Styling Iron 1.5”

Faster styling. Smoother results. One effortless pass.

The Bio Ionic OnePass Styling Iron 1.5” is a professional flat iron designed to create sleek, smooth and brilliantly shiny hair with fewer passes. The wider 1.5-inch plates make it an ideal choice for long, thick or coarse hair, allowing you to style larger sections at once without sacrificing control.

Powered by NanoIonic™ MX technology, the mineral-infused plates help maintain moisture while styling for hair that looks softer, smoother and healthier. Patented Silicone Speed Strips gently grip the hair as the iron glides from root to tip, helping deliver consistent tension without unnecessary pulling or snagging.

The result? Polished, frizz-controlled hair with beautiful shine — in less styling time.

Why You’ll Love It

• 1.5” wide styling plates cover more hair with every pass
• NanoIonic™ MX technology helps maintain moisture while styling
• Silicone Speed Strips help guide hair smoothly through the plates
• Helps reduce the appearance of frizz and flyaways
• Leaves hair looking smooth, soft and brilliantly shiny
• Digital temperature control up to 450°F / 230°C
• Fast, consistent heat for efficient styling
• Temperature memory remembers your previous heat setting
• Rounded design allows for both sleek straight styles and soft bends or curls
• Professional 9 ft cord
• Universal voltage for convenient travel
• Automatic shut-off

The OnePass Difference

Traditional flat irons can require repeatedly passing over the same section of hair to achieve a smooth finish. The Bio Ionic OnePass combines consistent heat, mineral-infused technology and its signature Silicone Speed Strips to help straighten and smooth hair efficiently from root to tip.

The 1.5” plate size makes this version particularly well suited to long, thick and coarse hair, where the wider styling surface can significantly speed up your routine.

Best For

Long Hair — Wide plates make it easier to style larger sections.

Thick & Coarse Hair — Adjustable professional heat provides the control needed for more resistant textures.

Frizz-Prone Hair — Helps create a smoother, more polished finish.

Fast Styling — The 1.5” plates are ideal when styling speed is a priority.

Straight or Polished Styles — Create sleek straight hair, smooth ends or subtle bends.

Key Specifications

Brand: Bio Ionic
Product: OnePass Styling Iron
Tool Type: Professional Flat Iron / Hair Straightener
Plate Width: 1.5”
Technology: NanoIonic™ MX
Maximum Temperature: 450°F / 230°C
Temperature Control: Digital Adjustable Heat
Temperature Memory: Yes
Silicone Speed Strips: Yes
Universal Voltage: Yes
Cord Length: 9 ft
Colour: Black

Frequently Asked Questions

Is the Bio Ionic OnePass 1.5” good for thick hair?

Yes. The wider 1.5” plates allow you to work with larger sections of hair, making the OnePass particularly well suited to thick, coarse and long hair.

What is the difference between a 1” and 1.5” flat iron?

A 1” flat iron generally offers more precision and can be easier to use on shorter hair. A 1.5” flat iron covers more surface area with each pass, making it an excellent option for longer, thicker hair or anyone who wants to straighten their hair more quickly.

Does the Bio Ionic OnePass reach 450°F?

Yes. The OnePass offers adjustable digital temperature control up to 450°F / 230°C, allowing you to select the appropriate heat level for your hair.

Can the Bio Ionic OnePass be used to curl hair?

Yes. Its rounded body can also be used to create bends, waves and soft flat-iron curls, although the wider 1.5” plate is especially well suited to straightening and smoothing.

Is the Bio Ionic OnePass dual voltage?

The OnePass 1.5” supports universal voltage, making it suitable for international travel when used with the appropriate plug adapter.