The waterproof patches last 12 hours or through six applications of sunscreen — whichever comes first. When purple, it’s time to reapply and when clear, you’re good to go!
Promising review: “As a person some call a day walker, I am in LOVE with the concept of these — I cannot tell you how many times I asked myself the question ‘should I put on more sunscreen?’ when it’s too late… and I’m as red as a lobster. When I read the description, I just had to buy them. Big fan of the packaging and portability, really ingenious idea. According to the Skin Cancer Foundation, yearly there are 5.4+ million cases of skin cancer are treated in more than 3.3 million people… and it’s time to start being better. They just arrived in the mail and my wife and I immediately put one on and lathered up with sunscreen and are sitting in the front yard — putting them to the test! Here is to a happier, healthier, future ahead!” —CopperStad
Get them from Amazon for $15.99+ (available in packs of 16, 32, and 48).
Source: https://www.buzzfeed.com/chelseastuart/products-for-summer-sweats