Blue Lizard Australian Sunscreen was developed to combat one of the most intense UV environments in the world. Tested according to Australian Standards, Blue Lizard maintains its extreme water resistance after 240 minutes in whirlpool water. Meanwhile, the FDA requires testing for 80 minutes in still water. All Blue Lizard formulas offer more than 30 times your skin's natural protection against UVB rays. We list our SPF at 30+ to preserve the integrity of our Australian roots. If you are applying correctly, SPF 30 is really all you need, and 30 is all that Australian Standards will allow sunscreens to claim!