I emailed Klim and here is what they said.....
Hi Mike,
The Togwotee glove has Gore-Tex laminated to the reverse side of the leather. By treating the leather on the Togwotee glove you help to repel the moisture and keep the LEATHER dry, which in turn helps to make the glove warmer, not to be confused with the inside of the glove Drier. Even though an untreated glove may appear to have the moisture absorbing into the leather, the Gore-Tex on the under side is stopping the moisture from getting through. Nix Wax is recommended for this purpose, but is not necessary to keep the glove waterproof. We have Nix Wax for $11.95, please let me know if you would like any more information.
Heather Harker