Forget No-Name Hair Straightener, Dyson Airstrait Restocked at Prime Day Low as Amazon Makes One Final 4th of July Push

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The Dyson Airstrait is a straightener that skips the hot metal plates. Two apertures on the inside of each arm shoot high-velocity air at your hair from a 45-degree angle, drying and straightening in the same pass. Wet Mode has three temperature settings for different hair types, ranging from 175°F to 285°F, and Dry Mode adds a Boost setting for touchups. A Cool Mode sets the finished style with room-temperature airflow.

Straightening from wet used to mean drying your hair with a blow dryer first, then running a flat iron over each section afterward. Two steps, two devices, and roughly 30 to 45 minutes for anyone with long or thick hair. The Airstrait handles both jobs at once. You start with towel-dried hair straight out of the shower and finish with a smooth, straight style in the same session.

Every flat iron on the market runs on the same principle. Two hot ceramic plates clamp around your hair, pressing it flat as the heat resets the hydrogen bonds in the strands. Dyson swapped the plates for airflow. Two 1.5mm apertures along the inside of each arm force air at 3.6 kilopascals of pressure at a 45-degree downward angle. The air stream is what straightens the hair, not direct contact with hot metal.

Wet Mode offers three temperature settings on the Airstrait. Fine, thin, or color-treated hair should be set to 175°F. Medium hair takes 230°F. Thick, coarse, or curly hair gets 285°F. Dry Mode adds two more temperature options for refreshing a style later in the day without wetting your hair down again. The airflow speed toggles between low and high, and a Cool Mode blows unheated air over your hair to set the style once the straightening pass finishes.

An LCD color screen on the handle displays the current mode, temperature, and airflow speed. The arms slide open and closed with a switch on the handle, so you can dry your roots with the arms clamped shut, then unlock them for full-length straightening. The Airstrait cuts off airflow after 3 seconds of inactivity to save energy, and shuts down entirely after 5 minutes if you set it on the counter.

Dyson launched the Airstrait in early 2024 as a new category rather than an update to an existing tool. At $399, down from $500, the price is $100 off the retail price Dyson has held it at since launch. If your morning routine involves both a blow dryer and a flat iron on the way to work, the Airstrait replaces both with a single device that runs one shorter pass instead of two longer ones.