Detailed answer

Water-resistant sunscreen is designed to offer protection even when exposed to water or sweat. The duration for which it remains effective varies depending on the specific product and its formulation. Generally, water-resistant sunscreens are labeled with a specific time, such as 40 or 80 minutes. This indicates the duration for which the sunscreen maintains its effectiveness in water. However, it is essential to reapply sunscreen immediately after toweling off, swimming, or excessive sweating to ensure continued protection from harmful UV rays. Regular reapplication every two hours, regardless of water exposure, is also recommended for optimal sun protection.