The design of the Adventures is a good fit for ADV and DS riding. I have used a pair off and on over the last two years, and we have another pair out on an extended test. That pair is rotating between multiple riders, and was here in the office today.
These are well worn black Adventures in size 44. Since we had them here, we decided to perform a static waterproof test on them. So....
we filled a bucket with 3.5" if water:
Grabbed a weight (to offset buoyancy) and paper towels (to show any leakage):
Stuffed the paper towels into the toe and along the footbed, put the sledge on top, closed it up, and:
This is in about 4.5" of standing water, which is pretty high:
....and left them in there for ONE FULL HOUR.