long. they think they do. but it is not the case. no matter what the case you have to rea loy. you have to keep it on. especially swimming. when it is water-resistant reapply. did we do this one. bull frog is a nice spray and did well in the test. and how much is that one? $10. i think it is $10. and then we have the oh, this is target brand. it is up and up. this one did well in our test and it is spf 50 so that is good. that is good. every summer you get the unoused ones and you keep them and throw them in the summer, and you pull them out. check the expiration.