Built for the rigors of international traveling the Osprey Sojourn Porter 46L backpack features high-tenacity and ballistic materials to stand up to abuse on our flights safaris penny cab rides and jeep tours. This carry-on-sized backpack features a large clamshell opening for easy access to our belongings which pack in safely thanks to the bag's padded sidewalls compression straps and mesh interior pockets. The middle-sized backpack in the Sojourn Porter line also features the Airscape back panel from Osprey's hiking packs along with a tuckaway waist belt sternum strap and shoulder straps to carry our belongings comfortably when we're on foot.