Mastering the Cool Shot Button

Most blow dryers feature a small button or switch labeled with a blue snowflake icon. Despite its prominence on the handle, it is frequently overlooked in favor of the high-heat settings that provide immediate gratification. The cool shot function serves a precise mechanical purpose: it lowers the temperature of the air stream to set the structure of the hair cuticle after heat has been applied.

By failing to transition from hot air to cool air, you leave the hair shaft in a malleable, vulnerable state. Learning to incorporate this step ensures that the volume and shape you create are locked into place, resulting in a cleaner finish and improved longevity.

  1. Dry until mostly set. Begin your blow-dry using your standard heat and airflow settings. Work the hair until it is roughly 80 percent dry. Do not attempt to use the cool shot while the hair is saturated, as the cold air will simply move moisture around without creating hold.
  2. Shape with heat. Focus on the specific section you intend to style, using a round brush to create tension. Apply the heated air for approximately 30 to 45 seconds. The heat softens the hydrogen bonds within the hair, allowing you to manipulate the texture.
  3. Engage the cool shot. Once the hair section is formed around the brush, keep the brush stationary. Depress the cool shot button and hold it while directing the cool air over the section. Continue this for 15 to 20 seconds, or until the hair feels cool to the touch.
  4. Release the tension. Only after the hair has completely cooled should you remove the brush from the hair. If you remove the brush while the hair is still warm, the cuticle will remain open and the shape will collapse. The cooling process is what effectively freezes the style in its new position.
  5. Finish with ambient air. Once the entire head is dry, switch the dryer to the lowest fan setting with no heat. Pass the dryer over the surface of the hair from root to tip. This smooths down any remaining raised cuticles and enhances the natural reflection of light on the hair surface.
Cool air is the structural anchor that holds your style in place throughout the day.