If you are looking for a COMPLETELY waterproof bag, this is IT! I went with my family to an amusement park and went on the log ride and two other rides that literally DUMP water on you. Everyone put thier belongings in it -- phones, glasses, some of them thier cameras, watches, etc. and I carried the bag on with me. Not ONE THING in this bag was wet! It's the closure at the top. NO WAY could anything get in. Like I stated....it truly does what it SAYS!