TropicSport passes the FDA 80-minute and the Australian 4-HOUR water resistance test. Our sunscreen is truly reef friendly as it does NOT contain Oxybenzone, Octinoxate, Octocrylene or Avobenzone. We contain only non-nano Zinc Oxide and Titanium Dioxide to ensure the safety of the Oceans' reefs. Our sunscreen will NOT go past the physical barrier of your skin and enter your bloodstream.