Can be attached to the front of a backpack or used as a standalone shoulder bag. I have been using it as a shoulder bag. 〈 2021AW Model 〉TC Front Bag A front bag that attaches to the shoulder harness. It is fixed around the chest area at four points, and is convenient for organizing small items that are frequently used, such as maps, cameras, smartphones, and energy bars. Can also be used as a shoulder bag or hip bag. Product number 501071 Volume 3L Size H18 x W23 x D11 (cm) Weight 250g Material 100D R/S NY (Nylon 100%) Thank you for viewing.