Waterproof of animal intestine. Alaska (Estados Unidos)
In Inuit villages (Eskimos) the raw material for everything was mostly of animal origin, also for the different pieces of clothing, such as the raincoats that were superimposed on the warm leather suits.
The process of its manufacture required the cleaning of the viscera by means of a scraping knife. After that, they were inflated, bleached and cut into strips of the right size to be sewn with animal fiber thread, probably tendons. The stitches were made with such skill that they did not allow water to enter. This type of raincoat could also be made with a hood.