Swimming. Lakes generally don't come with a securely closed box, and even if I come with company, they usually want to swim at the same time. Of course I don't

Swimming. Lakes generally don't come with a securely closed box, and even if I come with company, they usually want to swim at the same time. Of course I don't have to actually _use_ the phone while swimming, so it goes into a waterproof pouch - but having a 2nd layer of defense is nice.