Which product is commonly used to enhance skin hydration?

Moisturizers are specifically formulated to enhance skin hydration by creating a barrier that helps to lock in moisture, preventing water loss from the skin. They typically contain occlusive agents, humectants, and emollients that work together to improve the skin's moisture content, leaving the skin feeling soft and supple.

Other products such as exfoliants are designed to remove dead skin cells and may not directly contribute to hydration. Toners are typically used to balance the skin's pH and prepare it for further treatments, and cleansers are meant to remove dirt, oil, and impurities from the skin’s surface. While some toners might have hydrating properties, their primary function differs from the specific role of moisturizers in maintaining skin hydration. Thus, moisturizers are the go-to choice for directly enhancing skin hydration.