I've often wondered about this and, with a Hirsch Robby incoming, I thought I'd ask the collective.

Hirsch says the Robby is calf leather backed with rubber and is water resistant to 300m. Does this mean it can go down to 300m before it starts to fall apart? Can it be used it water at all i.e. for swimming? Surely the calf leather will be damaged using it for swimming?

Grateful for any advice.

Thanks.