Come and see our amazing products. Made with waterproof and wear-resisting Nylon,Metal Zipper,which provides strength and long-lasting performance, with minimal weight.Size:The size of the compression is 12*7cm(4.73*2.75inch),The expanded dimensions is 38*26*12cm(15*10.23*4.72inch), Capacity:18L.Structural Design:Constructed with 1 main pocket, 1 Built-in hidden pocket and 2 mesh side pockets. Main pocket is Large enough to carry what you need in the trip.Two large side mesh pockets for water bottles or umbrella.Foldable storage:It fits into an ultra-compact pouch. Easy to folds up into small pocket. So you can easily pack it in your suitcase for use at their destination as an extra bag for the trip.Occasion:The small backpack is perfect for day-to-day use or day trips, vacation, travel, camping or shopping etc. Pls confirm further with us if any query about packing info, inventory status and time schedule.