This sling bag is made of waterproof and tear-resistant 600D waterproof encrypted Oxford cloth. The tactical sling backpack has multiple pockets and a large internal space design, suitable for daily travel, cycling, dog walking, running, hiking, camping, etc. It features a scientific storage mezzanine design with a main pocket, middle pocket, and small pocket, as well as a foldable patch pocket. The overall size is 10 x 8 x 13.6 inches, providing enough space to store iPad, magazine, first aid kit, mobile phones, books, or water bottles, binoculars, keys, wallets, mobile phone chargers, and other daily necessities.