The fabric used for this bag is made from rPET, a plastic that comes from completely recycled water bottles. 13 plastic bottles have thus gone into the material used in this bag. Both zippered compartments feature interlocking sliders so you can secure content with a TSA-accepted padlock (provided) for enhanced security when travelling by train or plane. Stay organized on the go thanks to a large front pocket for easy access to last minute items. Choose to carry by hand or over the shoulder by using the dual-wrapping carry handles, or the adjustable and removable shoulder strap.