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Might be waterproof in the wet bush, might be waterproof in the rain even.
Not quite waterproof when swimming.

On the other hand, if I'd planned to go into the river I'd have brought togs with...

I took a punt and bought a pair of long shorts from Micklagaard when they were having a discounted offer. Even then they were expensive, but just awesome. Loden is hardly the bleeding edge of...