Leti AT4 Defense Photoprotect SPF50 was developed to meet the specific needs of atopic skin, which has a weakened skin barrier and greater susceptibility to external aggressions, including solar radiation. Its formula combines state-of-the-art sunscreens with ingredients that help protect and care for the skin during sun exposure. In addition to high SPF50 protection, this product offers an antioxidant action that helps neutralize free radicals generated by UV radiation and a chelating action on free iron, a catalyst involved in the formation of reactive oxygen species (ROS). These properties contribute to reducing oxidative stress and protecting the skin against sun-induced damage. The formula is enriched with Hexapeptide-42, shea extract, and Vitamin E, active ingredients that help reinforce the skin's barrier function, prolong hydration, and provide comfort to even the most sensitive skin. Clinical studies have demonstrated improved hydration, reduced tightness, and a calming effect after application. The fluid texture spreads easily, making it suitable for application on the face and body. It is water-resistant, absorbs quickly, and can be used daily by the whole family, including babies, children, and adults. The formula is hypoallergenic, paraben-free, and dermatologically and pediatrically tested.