?The choice of a New Version -- The 28 liters packable backpack for travel weighs only 0.60lb and the folded size is only 9.5 * 9.5 inches,Save your space to fold into its built-in pouch as a Sandwich size. Easily pack the back pack in your suitcase or purse. Easy to carry and store. Designed to easily pack it in your suitcase for use at their destination as as a ultra lightweight foldable packable backpack for hiking. ?Let the storm rage on -- The water resistant packable backpack is made with thickened water-resistant polyester material. Don't be afraid of getting wet even if it lightly rains with this lightweight daypack for hiking. ?Not all backpacks are created equal -- Made of High Quality Nylon Material. Heavy duty SBS metal zippers, smooth and uneasy to get damaged ,can adapt to long-term use. Mesh shoulder straps are adjustable and breathable.