The handsome EvoWood 81 has scales made of top quality walnut. The natural walnut, which is durable for light outdoor use, is colored in a rich dark stain to create individual shades and grain patterns in each knife, making each EvoWood 81 unique. Victorinox Swiss Army is commited to protecting the environment. The handles for each of our EvoWood pocketknives are constructed from sustainable top quality walnut using what would otherwise be waste material from other production processes.