This 18L foldable backpack is made of premium water-resistant and tear-proof fabric, lightweight, ultra-thin and durable. It can be folded into a small size for easy storage and carrying without taking up space. Large 18L capacity easily holds daily clothes, water bottles, books and outdoor essentials. Breathable padded shoulder straps reduce shoulder pressure for all-day comfort. Simple and stylish design suitable for outdoor hiking, camping, short trips and daily use, also perfect as junior high school student school bag....