Tuned for travel, the AirPorter is a backpack travel cover to keep your backpacking, trekking or hiking pack protected while in transit, be it by taxi, train or plane. Its lockable zipper provides added security and an improved shoulder strap makes lugging it to and fro a breeze. Comes in three sizes. KEY ATTRIBUTES BUILD YOUR OWN PACKING SYSTEM Part of a coordinated system for optimized packing. Customize your experience by adding on smart packing and organization accessories that meet your exact needs. Osprey Airporter Secure Backpack Travel Cover & Duffle Bag Latest Model - Medium Size