It's essential if you're going to be outside for more than about 2 hours. I recently tailgated at a Nascar race, and did this every two hours or so. I ended up getting home with barely a tan.
Also if you're swimming--doesn't matter if it says waterproof or not.
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re-applying sunscreen
Submitted by Barbara on May 19, 2008 - 10:26.
It's essential if you're going to be outside for more than about 2 hours. I recently tailgated at a Nascar race, and did this every two hours or so. I ended up getting home with barely a tan.
Also if you're swimming--doesn't matter if it says waterproof or not.