Prada Backpack is the Ultimate Balance of Style and Practicality. Miuccia Prada released her famous Prada backpacks in 1979. They are made out of Pocone, a waterproof nylon fabric. The tough military fabric was inspired by Miuccia’s grandfather’s cover for his steamer trunk. Success did not come immediately for the Prada backpack, but eventually became Miuccia Prada’s first commercial hit. And now, nylon has become a trademark material of Prada products.