Travelpro® Essentials™ SparePack™ Foldable Backpack 2.0New and improved! Throw this backpack in your luggage without sacrificing valuable space and pull it out when needed. The Travelpro SparePack Foldable Backpack 2. 0 is perfect as a nearly weightless extra bag to use on day excursions while traveling and for additional packing capacity as a personal carry on item if you come home with more than your luggage can hold. Made from resilient, abrasion resistant polyester fabric, this backpack folds up into