Learn how to create a functional gas mask inspired by the anime Dr. Stone using primitive stone age technology. Follow along as the process of crafting an iron knife, making a leather mask, assembling the components, and creating activated charcoal for filtration is demonstrated step-by-step. Discover the techniques for constructing a bamboo charcoal holder and witness the final testing of the homemade gas mask. Gain insights into combining ancient methods with modern engineering principles to recreate a piece of survival equipment.