What does a clay mask primarily do for the skin?

A clay mask primarily absorbs excess oil from the skin. Clay masks are formulated with natural clay minerals that have absorbent properties, making them highly effective for managing oiliness, particularly in those with oily or acne-prone skin. The clay helps to draw out impurities and excess sebum, which can lead to a clearer complexion and can prevent breakouts.

Using a clay mask can also help to refine the appearance of pores due to the removal of excess oil and debris, leading to a smoother texture. This functionality makes it especially popular in treatments designed for oily skin types.

While the other options address important skin concerns, they are not the primary function of a clay mask. For example, hydrating the skin is typically a function of cream-based or hydrating masks, exfoliation is achieved through scrubs or enzyme masks, and muscle tone is not directly influenced by topical treatments like clay masks. Thus, the focus of clay masks on oil absorption distinguishes them in the realm of skincare treatments.