A mask in a facial is generally selected based on:

A facial mask is generally selected based on the client's skin type and needs — for example, a hydrating mask for dry skin or a clay-based mask for oily skin — to address specific concerns identified during analysis. The mask is one step in the facial sequence and is left on for an appropriate time then removed. Matching the mask to the skin's needs follows from the analysis, echoing the same analysis-driven product selection seen in hair care. Knowing masks are chosen by skin type is part of the facial content.