I use a DryDock case, picked it up on holidays in Thailand for about A$20. They claim they are good to 10m. I;ve taken it down to 5 or 6 meters snorkling plenty of times and never had a problem. I also got the DryDock headphones for about A$10 and they are supposed to be good to 3m, have only ever used them for swimming and shallow duckdiving. I;m very happy with both.