I don't know where you heard that clemence is bad in water. Seriously, I would like to know who told you that, because that is completely wrong and I'll bet they have no experience with clemence.
That is how misinformation spreads.
I have carried both Togo and Clemence through downpours with no problem. In May DS2 had a day-long field trip in the rain so my bag was getting rained on for hours. Zero problem.
Clemence is FINE in water.
Togo is FINE in water.
If anyone tells you otherwise, they are wrong.
Wiping it dry doesn't hurt, but if it blisters, it is not Togo or Clemence.
I have 15 years personal experience with various H leathers: Togo, Clemence, Epsom, Chevre, Swift and Vache Liegèe.