Foldable Travel Backpack Bag – waterproof material, adjustable shoulder straps.. How often have you wished you had a backpack handy so you could carry items you need on a hike, a trip, or any other time you didnât expect to have so much to transport? If you take along our foldable travel backpack bag the next time you head out, you wonât have to worry that youâll have no convenient way to carry your items. This foldable traveling backpack is made of durable, waterproof material, with plenty of cushioning to wear it comfortably. At dimensions of 19.3 inches high, by 11.4 inches wide, by 3.9 inches deep, itâs extra roomy. Thereâs a zippered storage section on the front. When youâre not using the backpack, it becomes a zippered storage pouch, so you can fold up the backpack and store it right there. Because it comes in black, it goes with everything. Adjustable shoulder straps ensure that the backpack can be worn easily and comfortably by both adults and children. An extra handle on top is added convenience. The backpack also has a sturdy zipper. The traveling backpack is perfect for sports enthusiasts, hiking, traveling, and even students.. Foldable Travel Backpack Bag – waterproof material, adjustable shoulder straps.