Convenient and Comfortable Nike Black Backpack with Strings can reduce effectively shoulder pressure and improve comfort. The length of the straps can be adjusted by knotting and is suitable for people of different heights and shapes. This drawstring backpack can also be used for students in school classes and is ideal for storing books, laptops, school supplies, etc. It is lightweight, only weighs 170g. And this drawstring backpack is foldable and portable, you could fold it up in travelling, when you don't need it, it won't take up much space.