Good to hear the feedback from experience Glynn.

Even the importer agreed they would probably not survive a big crash at speed. I found the same with the Aquapac brand.
Unfortunately for me, and perhaps fortunately for others, I can report that both of the H2OAusdio bags survived my 40Kts+ wipeout last weekend at the end of the SP run, although I did have to chase the one that was ripped from my arm. It floated well and was intact except for the press studs on the armband connection popping. (I didn't even know they were press studs until then!). The other bag was still in place, although moved a bit, on my other arm. I hit the water with great force and tumbled a few times. It was a good one! Good bag test that is.