What type of mask is typically used in a nail treatment to hydrate the skin?

The cream mask is typically used in nail treatments to hydrate the skin because it contains moisturizing ingredients that penetrate the skin effectively. These masks are thicker in consistency, making them well-suited for providing hydration and nourishment to the skin. They often include components like oils, butters, and humectants, which help to retain moisture and leave the skin feeling soft and supple.

In contrast, peel-off masks are designed to dry and then be removed in one piece, often targeting specific concerns like oiliness or clogged pores, rather than primarily focusing on hydration. Clay masks also serve a different purpose; they are more about detoxifying and drawing out impurities from the skin, rather than providing moisture. Sheet masks do offer hydration, but they are generally made of fibers soaked in serums and do not have the rich, emollient properties of cream masks. Therefore, the cream mask stands out as the most effective option for hydrating the skin during a nail treatment.