-- Last Updated: Oct-20-12 1:21 PM EST --
I saw a mention of siping in this thread. My Keens do have siping in the tread and they get great traction in the wet slippery stuff. Mine are the original Keen Newport sandal, bought them when they first came out. That was sometime around 2003. Still wearing them and will wear them just about year round depending on what I am doing.
I tend to repair my stuff till they can't be realistically repaired anymore. Use blue tube Barge cement to repair where coming apart. Get it at the local leather/shoe shop downtown.
Siping works wonders on the wet slick stuff. Same goes with tires.