Landmark 40L Travel Pack

External loops for easy attachment of carabiners and other items to the backpack Safely store a water bottle and other small items in the zippered side pocket Keep money and passport protected from pickpockets in the hidden "CashStash" compartment under SafeZone Built-in whistle on the chest strap as an additional travel safety function Complies with most airlines carry-on size (always check with the airline for carry-on regulations before traveling)