Hiking Daypacks, Casual Foldable Personal Item Size Backpacks,, On Flights. ?Ergonomic and Comfortable Design?Our hiking backpack has breathable and thicked padded shoulder help to reduce fatigue. All stress points are reinforced with reinforcements to extend their life. Keeping you cool during hot weather and sweaty activities. A Luggage fixed strap,which is convenient to travel. ?Anti Theft Backpack Material?The waterproof backpack is made of polyester material, water-repellent, anti-tear, anti-scratch, and easy to clean. It can providing better protection for your valuable items from getting wet in sudden rain and durable for a long time, The anti-theft zipper unique pull design to prevent important documents and items from being stolen. . ?Lightweight Foldable?The opening size of the backpack is 18.3x12x7.08 inch,and the folding size is 7.08 x 9.44 inch.When you do not use the foldable backpacks,you can fold it into a compact pocket,and then open the black backpack when used.The 30L backpack complies with most airline carry-on regulations. This packable backpack weighs only 0.66LB, lighter than 4 eggs.Say goodbye to the burden of heavy backpacks! ?Collapsible Backpack Widely Used?Lightweight backpack for travel, vacation,hiking, camping, sport, overnight trip, daily use, shopping, fishing, and cycling,college, business work, errands, and more.It can be taken on any airline. ?Multi-Compartment Design? This packable backpack has 30L storage space. Featuring one main zipped compartment, a large zipped front pocket, one front zipped hidden pouch, one front zipper compartment, and 2 side pockets with reflective strips. One separator and one small zippered pocket in the main compartment to organize your travel essentials or daily items.