Combining strength and lightness, the indigo Pelican 1615TRVL Wheeled Check-In Case Lid Organizer and Packing Cubes is watertight, crushproof, dustproof, and optimized for travel. For travel by air, Pelican has aggregated available airline rules for check-in dimensions with the goal of creating a case that conforms to their requirements. Of course there will always be exceptions, so it's wise to contact your carrier before departing.