Rilastil AK 100-Repair Fluid is primarily intended for people with sensitive, delicate skin or skin prone to erythema and pigmentation changes who are looking for high sun protection combined with moisturizing care. It is particularly suitable for the daily protection of areas of skin exposed to the sun and environmental factors, including situations where the skin shows signs of actinic damage. Its formula combines sunscreens with ingredients designed to help moisturize, protect and soothe the skin. Niacinamide contributes to the care of the skin barrier, while bisabolol is used for its soothing properties. The presence of Sodium Hyaluronate, a form of hyaluronic acid, helps retain water in the skin and improve its hydration. The formula also includes vitamin E and vitamin C derivatives, associated with antioxidant protection. The product incorporates filters such as Octocrylene, Butyl Methoxydibenzoylmethane, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine and Titanium Dioxide (Nano), which provide protection against different components of ultraviolet radiation. The formula is presented by the manufacturer as having antioxidant and soothing action, in addition to hydrating and protecting the skin. The fluid texture facilitates even application and daily use. The manufacturer also presents the product as dermatologically tested, hypoallergenic, and non-comedogenic, characteristics particularly relevant for people seeking adequate sun protection for sensitive skin. In an efficacy test conducted by the manufacturer with 20 participants and daily application for 28 days, a 21.8% increase in skin hydration was recorded. This result corresponds to the specific conditions of the test and should not be interpreted as a guarantee of individual results.