375 g of lightweight foldable portable backpack: The size of a lightweight foldable backpack is 49 x 34 x 18 cm – and the folding size is 22 x 19 x 5 cm. In a compact pocket (size of sandwiches), then open the backpack when used. The foldable backpack that does not take up space is A good help for them walking, shopping, walking and walking dogs Lightweight folding backpack with a large capacity 30 litres. Our foldable backpack capacity is 30 litres – large capacity, many pockets. There is a main bag with a backpack, an inner partition. There are two front bags, two side bags and a privacy pocket. Whether it is a washing change or a travel certificate. A two-way SBS metal zipper prevents getting stuck in the zipper. era. The foldable backpack has a buckle and chest protection whistle. When you encounter an emergency, you can ring the whistle while waiting for rescue. You can accompany you on foot. ances,shopping ping,cycling and exercise!