The bottom of the zipper hides the expansion function, allowing you to solve the trouble caused by too many or too few items during travel. Wear-resistant and water-repellent fabric help keep the bag dry without worrying about rainy days. Made of durable Oxford cloth material, it is not easy to be scratched, torn, or leaked, and all items will be well protected. The design considered durability, functionality, portability, and fashion sense. His pack is made for all world travelers. The design considered durability, functionality, portability, and fashion sense.