Those skins things look waterproof but I would question their durability. As you phone may rub against other stuff in a pocket or pouch I wonder if they would puncture easily?? Once you skin had a hole in it then it would only hold water inside. I paid a 27 bucks for my cell dry bag and it works great but IMHO for the price, and for durability an ordinary small Ziploc freezer bag would do the same job.