This is a 2-in-1 travel backpack system consisting of a main backpack body (approx. 40L) and a detachable daypack (approx. 15L). The main backpack and daypack are secured with zippers and further secured with belts. The daypack can also be worn on the front and attached to the harness. During international travel, it was convenient to check the main backpack as baggage and use the daypack as carry-on luggage. The main backpack's harness can be protected with a cover, providing peace of mind when checking baggage. - Brand: Osprey - Model Name: Farpoint 55 - Color: Black - Design: Front Opening - Size: 55L Thank you for viewing. Size...50-100 L