PCA SKIN Active Broad Spectrum SPF 45 – Water Resistant helps protect for 80 minutes in water. This revolutionary formulation provides water resistant broad spectrum protection with a light finish. The superior blend of UVA/UVB protecting sunscreen agents, including ultra-sheer Z-Cote, provides superb sun-shielding benefits. Tested to protect for 80 minutes in water, it is the perfect choice for an outdoor lifestyle. Silybin, also known as Milk Thistle, and Caffeine provide superior antioxidant action to help maintain skin health during exposure. Directions: Smooth a nickel-sized amount onto skin after cleansing, toning and applying any PCA SKIN® treatment serums. Allow to absorb 15 minutes prior to daytime exposure. Reapply after two hours of sun exposure and repeat every two hours as needed. Active Ingredients: Zinc Oxide (8.0%), Octinoxate (7.5%), Octisalate (3.0%) Other Ingredients: Ascorbyl Palmitate, Butylene Glycol, Caffeine, Cyclopentasiloxane, Dimethicone/Peg-10/15 Crosspolymer, Dimethicone/Vinyl Dimethicone Crosspolymer, Ethylhexyl Isononanoate, Iodopropynyl Butylcarbamate, Lauryl Peg-9 Polydimethylsiloxyethyl Dimethicone, Phenoxyethanol, Silybum Marianum Extract, Sodium Chloride, Triethoxycaprylylsilane, Water/Aqua/Eau.