I would be lying if I said I haven't been searching for months for a solid waterproof bag for my phone. (I have a Samsung Galaxy S7 WITH a Lifeproof case on it!) My phone is waterproof.. my Lifeproof case is waterproof... but it's still not enough for me to just toss my phone in a pool or the ocean.
This phone bag TRULY does keep it dry and safe! I tested it out by putting a dry piece of paper towel inside and submerging in water for 15 minutes. It was completely dry! It has a very nice design with a good strong rubber seal and plastic knobs that turn and clamp down the seal.
If I could give any advice, it would be to not open the case until you're completely finished with your water-related activity, especially outdoors. The minute you open the case it will get super steamy, making it hard for you to see your screen or to take a clear picture/video.
It also comes with a hand strap and a neck strap, so you could potentially press record and film a video in 1st person, similar to a Go Pro! I really love this and I can't wait for our next two trips- Colorado and Mexico! This will definitely come in handy when getting those awesome action moments! I'll be sure to update my review with pictures and videos from our upcoming trips :)