Invisible Zinc Sport Mineral Sunscreen SPF 50+ is a water-resistant sunscreen for 4 hours, providing very high broad-spectrum UVA/UVB protection with naturally derived zinc oxide. Invisible Zinc is a physical sunscreen range that contains zinc oxide as the only active ingredient, providing a barrier to reflect harmful UVA + UVB radiation. This sunscreen is suitable for the family, sport, and active use. It is fragrance-free, broad-spectrum, and very high in UVA + UVB protection. It is also low in irritants for sensitive skin and does not contain parabens. Apply liberally and evenly to exposed skin 20 minutes prior to UV exposure, particularly on the face and back of hands. Reapply every two hours or more when sweating, and after swimming or toweling. Always read and follow the directions for use, and avoid prolonged UV exposure.