Thank you for asking this question, I've been wondering also.
Due to back problems, I wear Z-coils. I plan on wearing them at airports, walking, etc. but worried about rain ruining them.
I am now going to Walmart, thanks BOb E.,to buy a new pair of Crocs (not sure what brand is) as they are slip resistant. Just saw them recently, more expensive than other ($22.00) but thought the slip resistant part would be good if raining, etc. Hate to ruin my Z-coils!
We are leaving this Saturday so better get packing!!