Darkwood

Darkwood
Darkwood is a form of magically treated wood that allows it to become stronger then regular wood. Items made of this have a +1 higher hardness ratings when compared to equivalent ones made of wood. Since it is not metal it is immune to the attacks of creatures that may damage metal, like Rust Monsters.

Also, certain classes that have prohibitions against wearing metal armor, like Druids (if they are implemented), can wear Darkwood armor freely.