In terms of our Wool Collection, wool has a natural waxy ingredient called lanolin that creates a water-resistant coating on each fiber. The Wool shoes can definitely sustain a light rain and still keep your feet dry and insulated.
Our Tree Collection is made from Tencel, which loves to absorb water. Your Tree shoes can also handle a light drizzle, but for heavy downpours, we would definitely recommend leaving them at home.
If you're looking for an all-around better rain shoe, we recommend our shoes made out of Wool but neither of our materials are waterproof.
We do not recommend coating the shoes with anything as this can compromise their natural properties.