The BAGSMART Grey Falco 40L Expandable Airline Approved Carry On Travel Backpack is designed to meet the size requirements of almost all major airlines, fitting in both overhead compartments and under seats. It features a lie-flat opening design for quick security checks. The backpack includes 2 clothes storage bags and 1 shoe bag for organized packing. Its expandable design offers 25L-40L of storage space, accommodating 3-5 days of clothes. The comfortable airflow back design with thick padding and an adjustable chest buckle ensures easy hiking. Ideal for weekend trips, business trips, hiking, and camping.