The Lowepro Pro Trekker BP 550 AW II is a unique photographer's backpack that carries enough imaging gear for serious outdoor professionals. The new harness, with 11 points of adjustability, is designed and tested to carry over 60lbs of gear in a dense 40L volume. Pro Trekker meets airline carry-on requirements because our photographers not only need to trek to the most remote locations imaginable, but also have to keep their gear in-cabin. This design provides new levels of capacity, comfort, and protection from the elements for a true backcountry photo pack that fits overhead and personal item carry-on dimensions.