Cool wax should be applied in which direction?

Applying cool wax with the hair growth is the correct technique because it allows the wax to adhere more effectively to the hair shafts. When wax is applied in the same direction as the hair growth, it helps to ensure that the hairs are captured fully within the wax strip, which can lead to a cleaner and more efficient removal. This method reduces the likelihood of hair breakage and allows for smoother skin post-waxing.

In contrast, applying wax against the hair growth can lead to difficulties in hair removal, as it may cause some hairs to break rather than being pulled out from the root. A zigzag motion can also create uneven results and might not be effective for long hair removal. Additionally, applying wax perpendicularly to the hair growth may not provide the surface area needed for the wax to grip the hairs properly, which can also result in less effective hair removal and potential skin irritation. Thus, applying the wax with the hair growth maximizes effectiveness and minimizes discomfort.