Shoulder straps are fully adjustable.The D-Ring on shoulder,can be used for hanging small articles such as a climbing buckle or other small items.And this backpack is not only a backpack,but also can be used for Handbags or single shoulder bags.with bi-directional zipper,bi-directional puller design,from the side of the bag so you pull the bag shut from both directions.And the back pocket is closed,can be used for mobile phone,books and other daily supplies.Welcome to your inquiry!