When selecting a wax formula for underarm hair removal, the wax should be chosen based on hair:

Choosing the right wax formula for underarm hair removal is crucial, and the most important factor to consider is the hair's texture. Underarm hair can vary significantly in thickness and coarseness. Using a wax that is appropriate for the hair's texture ensures that it can effectively grip and remove the hair from the follicle without breaking it.

Coarse hair requires a stronger wax that adheres well to the hair and can pull it out without causing excessive discomfort or irritation. On the other hand, finer hair may require a gentler formula that doesn't have as strong of a grip. Selecting wax based on texture ensures that the hair removal process is efficient and results in smoother skin without unnecessary pain or skin damage.

Color, shape, and length do not significantly influence the choice of wax formula in the same way texture does. While they may provide some insight into the type of wax that could be suitable, they are not as critical as texture when it comes to achieving effective hair removal in the underarm area.