Dyson Airstrait Hair Straightener and Dryer in Plum | Copper - 492391-01

Dyson 492391-01 Airstrait Hair Straightener in Plum | Copper

The Dyson 492391-01 Airstrait hair dryer and straightener in special-edition Plum/Copper combines wet-to-dry styling without hot plates, 11.9 liters per second of airflow and intelligent temperature regulation up to 16 times per second. Wet and Dry modes let you straighten as you dry or refresh already-dry hair between washes, while hair-responsive airflow and a three-second automatic pause reduce unnecessary airflow between passes. Precisely angled air creates a smooth, salon-straight blow-dry with natural movement and volume, and an included presentation case keeps the tool protected when stored.

Key Features

Dry and Straighten in One Step

Drying and straightening happen together rather than as two separate steps, with no heat damage in wet-to-dry operation. Work methodically around the head in sections, letting precisely heated air create a straight style without direct contact with hot plates. Owners reported an average 25% reduction in drying and styling time, with up to eight minutes saved per session and up to an hour per week.¹

Soft, Smooth Hair With Natural Movement

Airflow-only styling helps retain hair's natural strength while leaving it soft, smooth and moisturized. In a consumer survey of 100 participants, 94% agreed that hair felt soft and 93% agreed that hair felt smooth. The finish retains movement and volume rather than sacrificing them for a straight style.

Intelligent Heat Control and 45-Degree Airflow

Glass-bead thermistors inside the arms regulate airflow temperature up to 16 times a second to help protect natural shine. Air directed downward at 45 degrees aligns strands and creates smoothing tension, helping reduce damage and breakage during wet-to-dry styling. Styling delivers twice the shine and up to 66% less unwanted frizz and flyaways.²

Dyson Hyperdymium Motor

A 13-blade impeller spins at up to 106,000 rpm and generates up to 3.6 kPa of air pressure. That pressure provides the airflow needed to straighten hair as it dries, making air the styling tool instead of heated plates.

Wet, Dry and Cool Styling Options

Start with Wet mode for freshly washed hair, or select Dry mode and a preset suited to your hair type to refresh your look between washes. Each mode offers three heat settings and two speeds, with Boost included in Dry mode. A high-definition color LCD keeps your airflow and temperature settings visible throughout styling.

Slide the arm lock closed to gently pre-dry roots and add root volume before working through the lengths. Once your hair is styled, use Cool mode to help set the finished look.

Hair-Responsive Airflow and Automatic Pause

Sensors detect hair between the arms and lower airflow when hair is absent for quieter, more efficient styling. After three seconds of inactivity, airflow pauses and resumes when the tool moves. Longer inactivity triggers a separate standby function: after five minutes with the arms open or three minutes with them locked, the LCD switches off and the power button is needed to restart.

PRCD Safety Plug

The Portable Residual Current Device (PRCD) tests electrical current. Housing key electronics in the plug also reduces bulk and weight in the handheld machine. Complete the user guide's TEST and RESET procedure before each styling session.

Features

• No Heat Damage in Wet-to-Dry Mode
  Straightens with air instead of hot plates.
• Up to 8 Minutes Saved Per Session
  Owner-reported savings compare with existing drying and styling routines.
• Softness and Smoothness
  Helps hair feel soft and smooth while retaining natural movement.
• Intelligent Heat Control
  Monitors airflow temperature to help protect natural shine.
• Twice the Shine and Up to 66% Less Frizz
  Wet-to-dry styling boosts shine and reduces unwanted flyaways compared with air drying.
• 45-Degree Smoothing Airflow
  Aligns strands with air for a sleek finish.
• Dyson Hyperdymium Motor
  A 13-blade impeller supplies the pressure needed for air-based straightening.
• Wet and Dry Modes
  Style freshly washed hair or refresh a straight look between washes.
• 3 Heat and 2 Speed Settings
  Adjust heat and airflow in either mode, with Boost available in Dry mode.
• High-Definition Color LCD
  Keep temperature and airflow settings in view as you style.
• Lockable Arms for Root Pre-Drying
  Close and lock the arms to prepare roots and add volume.
• Cool Finishing Mode
  Helps set your finished style.
• Hair-Responsive Airflow
  Automatically lowers airflow when no hair is detected between the arms.
• 3-Second Automatic Pause
  Stops airflow during inactivity and restarts it with movement.
• Automatic Standby
  Longer inactivity turns off the LCD until you restart with the power button.
• PRCD Safety Plug
  Tests electrical current before styling.
• Negative Ions
  Help reduce static during styling.
• Plum/Copper Finish and Presentation Case
  The special-edition straightener includes a case for protective storage.

Footnotes:

¹ Time-saving claims compare with owners' existing routines, based on a Dyson survey conducted in August 2023 with 250 US Airstrait owners after at least 30 days of use. Actual savings vary by hair and routine.

² Shine and frizz comparisons are against air drying, with the straightener used in wet-to-dry mode.

Performance figures are based on manufacturer testing or surveys under specific conditions; results vary with hair, settings and styling routine.

Before every use, press TEST and RESET on the PRCD safety plug and follow the user guide's step-by-step instructions.

Use the straightener only in the region where it was purchased. It is engineered for the voltage of its purchase country.

If styling challenges occur at 6,561 ft above sea level, consult a Dyson Expert.