Porter Flex Backpacks & Travels GreenPorter Yoshida & Co "Porter Flex" casual backpack, constructed of lightweight and durable ripstop nylon with mesh tear resistant technology. The structure is compact and foldable, lacking three dimensional pockets to optimize portability and reduce overall weight. Functional elements replace metal with plastic parts, ensuring a flat profile. The silhouette recalls military motifs, with a reflective label placed in front. Main material: lightweight and